Evaporation boat with flow guide stripe structure

Abstract

The utility model discloses an evaporation boat with a flow guide pattern structure, which comprises an evaporation boat end face area and an evaporation boat concave surface area, the evaporation boat end face area surrounds the evaporation boat concave surface area, and the height of the evaporation boat concave surface area is lower than that of the evaporation boat end face area; a flow guide net structure consisting of processed staggered flow guide lines is arranged in the concave surface area of the evaporation boat; the diversion net structure is sparse in the middle close to the concave surface area of the evaporation boat and dense in the end surface area close to the evaporation boat; a boss is arranged in the middle of the concave surface area of the evaporation boat, is used for placing a metal wire to be melted, and is in smooth connection with the concave surface area around the boss. According to the evaporation boat, the evaporation of molten metal in the coating process is more stable, the spreading area of the molten metal on the surface of the evaporation boat is larger, and meanwhile, the service life of the evaporation boat is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of vacuum coating technology, specifically to an evaporation boat with a flow-guiding texture structure. Background Technology

[0002] Vacuum metal deposition is a process that uses a high-vacuum environment to heat and vaporize a metal wire in an evaporation boat, causing the metal to adhere to the surface of a substrate and form a composite film. The evaporation boat is a crucial component of the evaporation source and is commonly used in vacuum deposition equipment. During the metal deposition process, the evaporation boat is heated by an electric current, and a wire feeding mechanism delivers the metal wire to the top wall of the boat. The evaporation boat vaporizes the metal wire into metal vapor, and these gaseous particles adhere to the substrate surface to form a metal coating. The quality of the evaporation boat significantly impacts the uniformity and quality of the metal coating. The evaporation boat is the most critical consumable component in vacuum aluminum plating equipment; its deposition efficiency and service life directly affect the production efficiency and costs of vacuum aluminum plating companies.

[0003] Conventional evaporation boats are formed by grinding the evaporation boat blank with a grinding wheel. The evaporation surface is boat-shaped and concave, with no obvious texture or irregular straight lines. During operation, the molten metal on the surface of this type of evaporation boat is affected by the surface tension of the liquid, resulting in a small area for the molten metal to spread. Therefore, a higher temperature is required to meet the required metal evaporation rate. When the temperature of the evaporation boat exceeds 1650℃, the corrosion resistance of the evaporation boat decreases. At this point, the evaporation boat is prone to pitting in the molten pool when impacted by metal wires. The molten pool pits reduce the thickness of the evaporation boat's main structure. During evaporation, the current at the bottom of the molten pool pit is high, and the temperature at the center of the pit is high, while the temperature of the freshly molten aluminum is low, making it prone to molten metal boiling. The boiling molten metal splashes onto the substrate, which is mostly made of organic materials with poor heat resistance. The high-temperature molten metal droplets can leave splash points or directly cause perforations on the substrate. The formation of the molten pool pits also causes a large amount of difficult-to-evaporate evaporation boat components to deposit on the evaporation surface. These deposited impurities will splash again during continuous heating. When the evaporation boat experiences frequent molten metal boiling or surface impurity splashing, its service life is nearing its end. The formation of substrate splash points or holes severely affects the product's appearance and physical properties. Therefore, existing evaporation boats have a short service life, requiring frequent replacements and incurring high production and labor costs for enterprises. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned problems by providing an evaporation boat with a flow-guiding texture structure.

[0005] The technical solution provided by this utility model is:

[0006] An evaporation boat with a flow-guiding texture structure includes an evaporation boat end face area and an evaporation boat concave face area, wherein the evaporation boat end face area surrounds the evaporation boat concave face area, and the height of the evaporation boat concave face area is lower than the height of the evaporation boat end face area.

[0007] The concave area of ​​the evaporator boat has a flow-guiding mesh structure composed of interlaced flow-guiding patterns that have been machined; the flow-guiding mesh structure is sparse near the center of the concave area of ​​the evaporator boat and dense near the end face of the evaporator boat.

[0008] The concave area of ​​the evaporation boat has a protrusion in the middle, which is used to place the metal wire to be melted, and the protrusion is smoothly connected to the surrounding concave area.

[0009] To optimize the above technical solution, the specific measures also include:

[0010] The density of the flow guiding net structure gradually changes from the middle of the concave area near the evaporator boat to the end face area near the evaporator boat.

[0011] Furthermore, the height of the boss is 6-15mm, and the depth of the guide pattern is 1-2mm.

[0012] The flow guide patterns include mutually perpendicular transverse flow guide patterns and longitudinal flow guide patterns. The spacing between adjacent transverse flow guide patterns and the spacing between adjacent longitudinal flow guide patterns gradually increase from the middle of the evaporation boat to the edge of the evaporation boat.

[0013] The evaporation boat is rectangular in shape.

[0014] Furthermore, the spacing between adjacent transverse guide lines is 0.5-3 mm, and the spacing between adjacent longitudinal guide lines is 1-4 mm.

[0015] Furthermore, the width of the transverse and longitudinal guide ripples is 0.25-1.5mm; the depth of the transverse and longitudinal guide ripples is 0.15-0.5mm.

[0016] As a preferred option, the edge of the guide net structure in the concave area of ​​the evaporation boat is provided with a blank area.

[0017] Furthermore, the boss is a rounded square, a circle, or an ellipse.

[0018] As the preferred solution

[0019] The surface of the boss also has flow guide patterns, which are concave patterns around the boss and through concave patterns on the boss itself.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This invention solves the problem of small spreading area of ​​molten metal in conventional evaporation boat coating process. By adding texture to the evaporation surface of the evaporation boat, the fluidity of the liquid on the surface of the evaporation boat is improved. The texture of the guide mesh on the outer periphery is denser, which promotes the flow of the surrounding molten metal, allowing the surrounding molten metal to spread more quickly, with a larger spreading area and faster temperature equilibrium, which can effectively avoid the phenomenon of metal boiling.

[0022] This invention can make the evaporation of molten metal during the coating process more stable, increase the area of ​​molten metal spreading on the surface of the evaporation boat, and improve the service life of the evaporation boat. Attached Figure Description

[0023] Figure 1 : A schematic diagram of the flow-guiding texture structure evaporation boat of Embodiment 1 of this utility model.

[0024] Figure 2 : A schematic diagram of the flow-guiding texture structure evaporation boat of Embodiment 2 of this utility model.

[0025] In the diagram: 1-Evaporation boat, 2-Evaporation boat end face area, 3-Evaporation boat concave area, 4-Flow guide net structure, 5-Protrusion, 6-Transverse flow guide pattern, 7-Vertical flow guide pattern, 8-White edge, 9-White area. Detailed Implementation

[0026] The present invention will be further described in detail below through embodiments, but it should not be construed as the scope of the present invention being limited to the following embodiments. All technologies implemented based on the present invention fall within the scope of the present invention.

[0027] In the description of this utility model, it should also be noted that:

[0028] The orientations or positional relationships described herein are based on the relationships shown in the accompanying drawings and are only for the purpose of facilitating the description of this utility model and simplifying the description. They are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] This utility model provides an evaporation boat 1 with a flow-guiding texture structure, including an evaporation boat end face area 2 and an evaporation boat concave face area 3. The evaporation boat end face area 2 surrounds the evaporation boat concave face area 3, and the height of the evaporation boat concave face area 3 is lower than the height of the evaporation boat end face area 2.

[0030] The concave area 3 of the evaporator boat has a flow guide network structure 4 composed of interlaced flow guide patterns that have been processed; the flow guide network structure 4 is sparse near the middle of the concave area 3 of the evaporator boat and dense near the end face area 2 of the evaporator boat.

[0031] A boss 5 is provided in the center of the concave area 3 of the evaporation boat. The boss 5 is used to place the metal wire to be melted. The boss 5 is smoothly connected to the surrounding concave area.

[0032] The density of the flow guiding net structure 4 gradually changes from the middle of the concave area 3 near the evaporator boat to the end face area 2 near the evaporator boat.

[0033] In some embodiments, the height of the boss 5 is 6-15mm and the depth of the guide ripples is 1-2mm.

[0034] The flow guide pattern includes mutually perpendicular transverse flow guide patterns 6 and longitudinal flow guide patterns 7. The spacing between adjacent transverse flow guide patterns 6 and the spacing between adjacent longitudinal flow guide patterns 7 gradually increase from the middle of the evaporation boat 1 to the edge of the evaporation boat 1.

[0035] The evaporation boat 1 is rectangular in shape.

[0036] In some embodiments, the spacing between adjacent transverse guide lines 6 is 0.5-3 mm, and the spacing between adjacent longitudinal guide lines 7 is 1-4 mm.

[0037] In some embodiments, the width of the transverse guide ripples 6 and the longitudinal guide ripples 7 is 0.25-1.5 mm.

[0038] In some embodiments, the depth of the transverse guide ripples 6 and the longitudinal guide ripples 7 is 0.15-0.5 mm.

[0039] In some embodiments, the guide net structure 4 of the concave area 3 of the evaporation boat has a blank area 9 at its edge.

[0040] The boss 5 is a rounded square, a circle, or an oval.

[0041] In some embodiments, the surface of the boss 5 also has guide lines, which are concave areas around the boss 5 and through concave lines on the boss 5.

[0042] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, further illustrates the following:

[0043] Example 1

[0044] like Figure 1 As shown, the evaporation boat 1 is a resistive heating material with a certain thickness. It is rectangular in shape. The evaporation boat 1 includes a concave evaporation boat area 3 and an end face area 2 surrounding the concave evaporation boat area 3. The height of the concave evaporation boat area 3 is lower than the height of the end face area 2. The concave evaporation boat area 3 has a flow guiding mesh structure 4 composed of interlaced flow guiding patterns milled to a depth of 1-2 mm by a milling machine.

[0045] The flow guide structure 4 is sparse near the middle of the concave area 3 of the evaporation boat and dense near the end face area 2 of the evaporation boat; a rounded square protrusion 5 is provided in the middle of the concave area 3 of the evaporation boat, the height of the protrusion 5 is 10mm, the protrusion 5 is used to place the metal wire to be melted, the setting of the protrusion 5 makes the melting area of ​​the metal wire have a certain thickness, the properties are more stable, and avoids the formation of erosion pits, etc., and the molten metal can spread quickly to the surrounding area, improving the evaporation efficiency; the protrusion 5 is smoothly connected to the surrounding concave area, which can accelerate the flow of molten metal and avoid droplet splashing.

[0046] When the metal wire is placed on the boss 5, the bottom of the central boss 5 is heated during the evaporation coating process. The molten metal formed by the molten metal wire flows from the guide mesh from the boss 5 to the surrounding concave area. Because the guide mesh on the outer periphery is denser and has more textures, it promotes faster flow of the molten metal in the surrounding area, allowing the molten metal in the surrounding area to spread out more quickly, with a larger spreading area and a faster temperature equilibrium, making the evaporation of the molten metal in the coating process more stable.

[0047] A blank area 9 is provided at the edge of the concave area 3 of the evaporation boat. The distance between the blank area and the end face area of ​​the evaporation boat should be 210mm-20mm. According to the test, when the distance between the blank area and the end face is less than 10mm, the temperature at this point is lower than that of the electrode fixture, which is close to the lower temperature. The molten metal is not easy to evaporate here, but splashing is easy to occur. When the distance between the blank area and the end face is greater than 20mm, the effective evaporation area of ​​the evaporation boat 1 is reduced sharply. The blank edge 8 of the evaporation surface can effectively prevent the molten metal from flowing to the fixture during the coating process.

[0048] In this embodiment, the transverse guide lines 6 are spaced 1-4mm apart. According to the test, when the spacing is less than 1mm, the evaporation boat 1 is more susceptible to erosion by the molten metal, and the service life of the evaporation boat 1 is reduced. When the spacing is greater than 4mm, the fluidity of the molten metal on the surface of the evaporation boat 1 is weakened. The design of increasing the center spacing distance is to avoid the center being eroded by the molten metal too quickly. The distance on both sides is reduced to increase the fluidity of the molten metal on both sides and increase the spreading area of ​​the molten metal.

[0049] In this embodiment, the longitudinal guide lines 7 are spaced 0.5-3mm apart. According to the test, when the spacing is less than 0.5mm, the evaporation boat 1 is more susceptible to erosion by the molten metal, and the service life of the evaporation boat 1 is reduced. When the spacing is greater than 3mm, the fluidity of the molten metal on the surface of the evaporation boat 1 is weakened. The design of increasing the center spacing distance is to avoid the center being eroded by the molten metal too quickly. The distance on both sides is reduced to increase the fluidity of the molten metal on both sides and increase the spreading area of ​​the molten metal.

[0050] In this embodiment, the width of the transverse guide strips 6 and the longitudinal guide strips 7 is 0.5 mm. According to the test, when the width is less than 0.25 mm, the fluidity of the molten metal on the surface of the evaporation boat 1 is weakened; when the width is greater than 1.5 mm, the spreading area of ​​the molten metal on the surface of the evaporation boat 1 is reduced.

[0051] In this embodiment, the transverse guide lines 6 and the longitudinal guide lines 7 have a depth of 0.3 mm. According to the test, when the depth is less than 0.15 mm, the fluidity of the molten metal on the surface of the evaporation boat 1 is weakened; when the depth is greater than 0.5 mm, the erosion of the evaporation boat 1 by the molten metal increases, and the life of the evaporation boat 1 is reduced.

[0052] Example 2

[0053] like Figure 2 As shown, the main structure of this embodiment is basically the same as that of embodiment 1. The difference is that the surface of the boss 5 also has flow guide patterns. The flow guide patterns are concave areas around the boss 5 and through concave patterns on the boss 5. The flow guide patterns of the boss 5 can make the molten metal flow better and the molten metal can spread quickly on the evaporation boat 1.

[0054] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent substitutions, and improvements made by those skilled in the art to the above embodiments without departing from the scope of the present utility model's technical solution and based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model's technical solution.

Claims

1. An evaporation boat with a flow-guiding texture structure, characterized in that: It includes an end face area of ​​the evaporator boat and a concave face area of ​​the evaporator boat, wherein the end face area of ​​the evaporator boat surrounds the concave face area of ​​the evaporator boat, and the height of the concave face area of ​​the evaporator boat is lower than the height of the end face area of ​​the evaporator boat. The concave area of ​​the evaporator boat has a flow-guiding mesh structure composed of interlaced flow-guiding patterns that have been machined; the flow-guiding mesh structure is sparse near the center of the concave area of ​​the evaporator boat and dense near the end face of the evaporator boat. The concave area of ​​the evaporation boat has a protrusion in the middle, which is used to place the metal wire to be melted, and the protrusion is smoothly connected to the surrounding concave area.

2. The evaporation boat with a flow-guiding texture structure according to claim 1, characterized in that: The density of the flow guiding net structure gradually changes from the middle of the concave area near the evaporator boat to the end face area near the evaporator boat.

3. The evaporation boat with a flow-guiding texture structure according to claim 1, characterized in that: The height of the boss is 6-15mm, and the depth of the guide strip is 1-2mm.

4. The evaporation boat with a flow-guiding texture structure according to claim 1, characterized in that: The flow guide patterns include mutually perpendicular transverse flow guide patterns and longitudinal flow guide patterns. The spacing between adjacent transverse flow guide patterns and the spacing between adjacent longitudinal flow guide patterns gradually increase from the middle of the evaporation boat to the edge of the evaporation boat.

5. The evaporation boat with a flow-guiding texture structure according to claim 4, characterized in that: The evaporation boat is rectangular in shape.

6. The evaporation boat with a flow-guiding texture structure according to claim 5, characterized in that: The spacing between adjacent transverse guide lines is 0.5-3mm, and the spacing between adjacent longitudinal guide lines is 1-4mm.

7. The evaporation boat with a flow-guiding texture structure according to claim 5, characterized in that: The width of the transverse and longitudinal guide ripples is 0.25-1.5mm; the depth of the transverse and longitudinal guide ripples is 0.15-0.5mm.

8. The evaporation boat with a flow-guiding texture structure according to claim 1, characterized in that: The guide net structure in the concave area of ​​the evaporation boat has a blank area at its edge.

9. The evaporation boat with a flow-guiding texture structure according to claim 1, characterized in that: The protrusion is a rounded square, a circle, or an ellipse.

10. The evaporation boat with a flow-guiding texture structure according to claim 1, characterized in that: The surface of the boss also has flow guide patterns, which are concave patterns around the boss and through concave patterns on the boss itself.

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