A kind of air floatation oven for copper foil surface treatment

Abstract

A kind of air floatation oven for copper foil surface treatment, including box, first heat-conducting baffle and second heat-conducting baffle are respectively arranged in box, there is first side air outlet and second side air outlet on the side wall of box, first lower air outlet and second lower air outlet are arranged on the bottom wall of box, two side air outlets are connected with its corresponding lower air outlet respectively by air conveying pipeline;First air conveying pipeline and second air conveying pipeline are installed on the two sides of box, can play the role of circulation, so that the wind on the upper and lower surfaces of copper foil can enter the pipeline;Box is respectively provided with first heat-conducting baffle and second heat-conducting baffle arranged in parallel, can make the position and heat of drying more uniform, ensure the uniformity of the heating of copper foil with large width and thin thickness, the adjustability of drying temperature and air volume, the adaptability of air floatation oven to different width copper foil and the stability of running through, with the characteristics of simple structure, low cost and improve drying efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of copper foil surface treatment equipment, in particular to an air flotation oven for copper foil surface treatment. Background Art

[0002] Existing air flotation ovens primarily consist of an oven, fan, air guide plates, and air outlets. The fan is fixed to the upper and lower sides of the oven, and two air guide plates are fixed inside the oven. These plates have air holes evenly distributed, with the upper and lower air guide holes staggered. Traditional air flotation ovens suffer from issues such as difficulty in accurately controlling the upper and lower air volume, noticeable copper foil vibration, and uneven temperatures within the oven.

[0003] Chinese patent CN216359859U discloses an air flotation oven, comprising a frame, bellows, air guide plates, and a drive tube. Bellows are mounted on the upper and lower sides of the frame, and air guide plates are installed on the upper and lower sides of the frame. These air guide plates have multiple air outlets, which are staggered. This patent blocks the hot air outlets, redirecting the hot air toward the center. However, copper foil surface treatment requires uniform hot air across the width of the sheet.

[0004] Chinese patent CN212409335U discloses an energy-saving device for a double-sided air-floating oven hot air circulation system, which specifically includes upper and lower return air merging ducts and return air separation baffles, upper oven return air ducts, and lower oven return air ducts. The advantages are reduced energy consumption and improved drying efficiency, but how to ensure the uniformity of the upper and lower oven temperatures and air volume is a problem that needs to be solved. Summary of the Invention

[0005] In order to overcome the deficiencies of the above-mentioned prior art, the object of the present invention is to provide an air flotation oven for copper foil surface treatment, which utilizes thermal circulation and heat conduction technology to ensure uniform temperature and air volume distribution on the upper and lower sides and in the width direction of the copper foil to be treated, and ensures the uniformity of heating of wide and thin copper foil, the adjustability of drying temperature and air volume, the adaptability of the air flotation oven to copper foils of different widths, and the stability of operation. The invention has the characteristics of cost savings, simple device structure, and good drying and air flotation dragging effects on the copper foil.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A flotation oven for copper foil surface treatment comprises a box body, an outer surface of the box body is provided with a fan connected to the interior of the box body, a first heat conduction diverter plate and a second heat conduction diverter plate arranged in parallel are respectively provided inside the box body, a first side air outlet and a second side air outlet are provided on the side wall of the box body, a first lower air outlet and a second lower air outlet are provided on the bottom wall of the box body, one end of a first air duct is connected to the first side air outlet, the other end of the first air duct is connected to the first lower air outlet, one end of a second air duct is connected to the second side air outlet, and the other end of the second air duct is connected to the second lower air outlet.

[0008] The first heat conducting diverter plate is provided with a first heat conducting diverter plate groove and a first heat conducting diverter plate air outlet, the second heat conducting diverter plate is provided with a second heat conducting diverter plate groove and a second heat conducting diverter plate air outlet, and heating tubes are placed in both the first heat conducting diverter plate groove and the second heat conducting diverter plate groove.

[0009] The width of the first heat conducting diverter plate and the second heat conducting diverter plate must be greater than the width of the copper foil by more than 400 mm.

[0010] The relationship between the number N of the first heat conducting diverter plate grooves or the second heat conducting diverter plate grooves and the copper foil width L (mm) is:

[0011]

[0012] Wherein, N is the number of grooves of the first heat conducting manifold plate or the second heat conducting manifold plate; L (mm) is the width of the copper foil; d1 is the distance between the two grooves, and the range of d1 is 100-140 mm; the calculated result of N is rounded.

[0013] The number of rows of the first heat conduction manifold plate tuyere and the second heat conduction manifold plate tuyere is the same, set as N1 = N-1; the number of single row tuyere Wherein, L1 is the length of the first heat conducting manifold or the second heat conducting manifold; d2 ranges from 50 to 70 mm and is the center distance between adjacent air outlets of the first heat conducting manifold or the second heat conducting manifold. The calculated result is rounded.

[0014] The positions of the first heat conduction diverter plate vents and the second heat conduction diverter plate vents are staggered.

[0015] The centers of the first side air outlet and the second side air outlet are aligned with the height of the copper foil.

[0016] The installation positions of the first air duct and the second air duct must place the copper foil in the middle of the duct cross section so that wind on the upper and lower surfaces of the copper foil can enter the duct.

[0017] The beneficial effects of the present invention are:

[0018] 1. Since the first heat conduction diverter plate and the second heat conduction diverter plate arranged in parallel are respectively provided inside the box, the drying position and heat can be made more uniform, which has the characteristic of improving the drying efficiency.

[0019] 2. Since there are a first side air outlet and a second side air outlet on the side wall of the box body, and a first lower air outlet and a second lower air outlet are provided on the bottom wall of the box body, one end of the first air duct is connected to the first side air outlet, and the other end of the first air duct is connected to the first lower air outlet, one end of the second air duct is connected to the second side air outlet, and the other end of the second air duct is connected to the second lower air outlet, that is, the first air duct and the second air duct are installed on both sides of the box body, which can play a circulation role, so that the wind blown to the lower surface of the copper foil continues to flow out through the first air duct and the second air duct. Therefore, the installation position of the first air duct and the second air duct needs to make the copper foil in the middle of the duct cross section, so that the wind on the upper and lower surfaces of the copper foil can enter the duct, which has the characteristic of increasing drying efficiency.

[0020] 3. Since the first heat-conducting diverter plate is provided with a first heat-conducting diverter plate groove and a first heat-conducting diverter plate air outlet, the second heat-conducting diverter plate is provided with a second heat-conducting diverter plate groove and a second heat-conducting diverter plate air outlet, heating tubes are placed in the first heat-conducting diverter plate groove and the second heat-conducting diverter plate groove. The arrangement of multiple rows of heat-conducting diverter plates and heat-conducting diverter plate grooves and the heating tubes placed in the first heat-conducting diverter plate groove and the second heat-conducting diverter plate groove increases the contact area between the two and is also more convenient for disassembly and assembly.

[0021] 4. The dimensions of the first and second heat conducting diverter plates of the present invention can be designed according to the width of the copper foil to be dried. The density of the air outlets of the first and second heat conducting diverter plates and the diameter d3 of a single air outlet will have different degrees of influence on drying and flotation. Based on a large number of experiments, the present invention has found the optimal relationship between the number of grooves of the first or second heat conducting diverter plates and the number of air outlets in a single row and the thickness and width of the copper foil, namely: If the copper foil is thin and wide, N and N2 can be relatively large, and d3 can be relatively large. The optimization of the number of grooves and single-row air outlets can make the hot air temperature and air volume in the upper and lower cavities more uniform, thereby meeting the stable passage of wide and thin copper foil.

[0022] 5. Since the positions of the air outlets of the first heat conduction manifold plate and the air outlets of the second heat conduction manifold plate are staggered and arranged asymmetrically on the left and right, the drying can be made more uniform and the efficiency can be improved.

[0023] It can be seen that the present invention connects the upper and lower cavities of the box body through the first air duct and the second air duct, and at the same time arranges the first heat conduction diverter plate and the second heat conduction diverter plate at the air outlet of the first heat conduction diverter plate and the second heat conduction diverter plate. The first heat conduction diverter plate and the second heat conduction diverter plate are heated by the heating pipe, which ensures that the air volume and temperature in all directions after the air flow passes through the first heat conduction diverter plate and the second heat conduction diverter plate are more uniform, ensuring the stable passage and drying of the copper foil, and has the characteristics of simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional view of the present invention.

[0025] Figure 2 It is a top view of the first heat conducting diverter plate and the second heat conducting diverter plate of the present invention.

[0026] Wherein: 1. Box body; 11. First air inlet; 12. Second air inlet; 13. First side air outlet; 14. Second side air outlet; 15. First lower air inlet; 16. Second lower air inlet; 2. Fan; 3. Heating tube; 4. First heat-conducting diverter plate; 41. First heat-conducting diverter plate groove; 42. First heat-conducting diverter plate air outlet; 5. Copper foil; 6. Second air duct; 7. Second heat-conducting diverter plate; 71. Second heat-conducting diverter plate groove; 72. Second heat-conducting diverter plate air outlet; 8. First air duct. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] Reference Figure 1The utility model provides a kind of air floatation oven for copper foil surface treatment, including box 1, fan 2 is provided with with box 1 inside in box 1 outer surface, box 1 inside is separately provided with first heat-conducting baffle 4 and second heat-conducting baffle 7 being arranged in parallel, first side air outlet 13 and second side air outlet 14 are provided on the side wall of box 1, first lower air outlet 15 and second lower air outlet 16 are provided on the bottom wall of box 1, first air conveying pipe 8 one end is connected with first side air outlet 13, first air conveying pipe 8 other end is connected with first lower air outlet 15, second air conveying pipe 6 one end is connected with second side air outlet 14, second air conveying pipe 6 other end is connected with second lower air outlet 16.The wind of fan blows first through first air inlet 11 and second air inlet 12, enters box 1 inside, airflow passes through first heat-conducting baffle 4 and heating pipe 3 placed in the recess 41 of first heat-conducting baffle, enters the upper cavity of box 1 by first heat-conducting baffle air port 42, the airflow in upper cavity enters first air conveying pipe 8 and second air conveying pipe 6 by first side air outlet 13 and second side air outlet 14, then enters box 1 by first lower air outlet 15 and second lower air outlet 16, airflow passes through second heat-conducting baffle 7 and heating pipe 3 placed in the recess 71 of second heat-conducting baffle, enters the lower cavity of box 1 by second heat-conducting baffle air port 72.

[0029] Refer to Figure 2 , first heat-conducting baffle 4 is equipped with first heat-conducting baffle recess 41 and first heat-conducting baffle air port 42, and second heat-conducting baffle 7 is equipped with second heat-conducting baffle recess 71 and second heat-conducting baffle air port 72, and heating pipe 3 is placed in first heat-conducting baffle recess 41 and second heat-conducting baffle recess 71, and the arrangement of multiple rows of heat-conducting baffles and heat-conducting baffle recesses, and heating pipe 3 is placed in first heat-conducting baffle recess 41 and second heat-conducting baffle recess 71, so that the contact area of the two is increased, and the disassembly and assembly are also convenient.

[0030] The size of first heat-conducting baffle 4 and second heat-conducting baffle 7 can be designed according to the width of the copper foil to be dried, in order to ensure the stability of the installation of first heat-conducting baffle 4 and second heat-conducting baffle 7 and the drying effect, combined with the speed of copper foil, the length of first heat-conducting baffle 4 and second heat-conducting baffle 7 is generally set to L1=500mm.

[0031] The number N of first heat-conducting baffle recess 41 or second heat-conducting baffle recess 71 and the width L (mm) of copper foil are related as follows:

[0032] Wherein, N is the number of first heat-conducting baffle recess 41 or second heat-conducting baffle recess 71, L (mm) is the width of copper foil, d1 is the distance between two recesses, d1 is in the range of 100-140mm, and N is rounded.

[0033] The number of rows of the first heat conducting diverter plate vents 42 and the second heat conducting diverter plate vents 72 is the same, set as N1 = N-1; the number of rows of vents in a single row Wherein, L1 is the length of the first heat conducting diverter plate 4 or the second heat conducting diverter plate 7; d2 ranges from 50 to 70 mm and is the center distance between adjacent first heat conducting diverter plate vents 42 or second heat conducting diverter plate vents 72, and the calculated result is rounded.

[0034] The first heat conducting diverter plate vents 42 and the second heat conducting diverter plate vents 72 are staggered and arranged asymmetrically on the left and right, which can make the drying more uniform and improve the efficiency.

[0035] The centers of the first side air outlet 13 and the second side air outlet 14 are aligned with the height of the copper foil 5. When the system is stable, the airflow above and below the copper foil completes the circulation through the first air duct 8 and the second air duct 6. The circulation of the upper and lower cavities through the first air duct 8 and the second air duct 6 can ensure the uniformity and consistency of the airflow velocity and temperature on the surface of the copper foil.

[0036] The installation positions of the first air duct 8 and the second air duct 6 need to place the copper foil in the middle of the duct cross section so that wind on the upper and lower surfaces of the copper foil can enter the duct.

[0037] The heating tube 3 contacts the first heat conducting diverter plate groove 41 and the second heat conducting diverter plate groove 71, so that the first heat conducting diverter plate 4 and the second heat conducting diverter plate 7 conduct heat to the required temperature. The air flow passes through the first heat conducting diverter plate 4 and the second heat conducting diverter plate 7 to ensure that the temperature deviation in all directions is small.

[0038] The working principle of the present invention is:

[0039] The copper foil 5 enters the box body 1 after surface treatment, and the air is sent into the box body 1 by the fan 2 on the upper surface of the box body 1. The heating pipe 3 placed in the groove 41 of the first heat conduction diverter plate heats the first heat conduction diverter plate 4 by heat conduction. The air flow is heated when passing through the first heat conduction diverter plate 4, and then the heated warm air is blown to the upper surface of the copper foil 5, enters the upper cavity of the box body 1 through the air outlet 42 of the first heat conduction diverter plate, and then passes through the first side air outlet 13 and the second side air outlet 14 on the inner side of the box body 1, and passes through the first air duct 8. and the second air duct 6, and then enters the box body 1 through the first lower air outlet 15 and the second lower air outlet 16. The air flow passes through the second heat-conducting diverter plate 7 and the heating tube 3 placed in the groove 71 of the second heat-conducting diverter plate, and enters the lower cavity of the box body 1 through the second heat-conducting diverter plate air outlet 72. The cycle is repeated in the same way. By adding the first heat-conducting diverter plate 4 and the second heat-conducting diverter plate 7, not only the air volume and temperature blown to the copper foil surface in all directions are made more uniform, ensuring the stable passage and drying of the copper foil, but also achieving the purpose of energy saving and consumption reduction.

[0040] Example 1

[0041] Set the diameter of the air outlet d3 = 50mm, the heat conduction diverter groove And the number of single row air outlets The groove spacing d1 = 100mm, the center distance between the adjacent heat diverter plate tuyere d2 = 50mm, the copper foil width L = 1550mm, the thickness h = 6μm, and the heat conduction diverter plate length L1 = 500mm, can be obtained as N = 16, N2 = 11. At this time, there are no obvious wrinkles in the width direction of the copper foil, and there is no obvious jitter of the copper foil as a whole. This shows that under this parameter, while meeting the heating uniformity, it ensures that the wide and thin copper foil can pass stably.

[0042] Example 2

[0043] Set the diameter of the air outlet d3 = 80mm, the heat conduction diverter groove And the number of single row air outlets The groove spacing d1 = 100mm, the center distance between the adjacent heat diverter plate tuyere d2 = 50mm, the copper foil width L = 1550mm, the thickness h = 6μm, and the heat conduction diverter plate length L1 = 500mm, can be obtained as N = 16, N2 = 11. At this time, slight wrinkles are observed in the width direction of the copper foil, and the copper foil as a whole has slight irregular shaking, indicating that the change in the size of the upper and lower tuyere of the oven, while ensuring uniform heating, has a certain impact on the stability of the wide and thin copper foil.

[0044] Example 3

[0045] Set the diameter of the air outlet d3 = 50mm, the heat conduction diverter groove And the number of single row air outlets The groove spacing d1 = 120 mm, the center distance between adjacent heat diverter plate tuyere d2 = 60 mm, the copper foil width L = 1550 mm, the thickness h = 6 μm, and the heat conduction diverter plate length L1 = 500 mm, can be obtained as N = 13, N2 = 9. At this time, intermittent wrinkles are observed in the width direction of the copper foil, and the copper foil as a whole has slight irregular shaking, indicating that when other conditions remain unchanged, the change in the groove spacing and the center distance between adjacent heat diverter plate tuyere has a certain influence on the stability of the wide and thin copper foil.

[0046] Example 4

[0047] Set the diameter of the air outlet d3 = 50mm, the heat conduction diverter groove And the number of single row air outlets The groove spacing d1 = 140 mm, the center distance between adjacent heat diverter plate tuyere d2 = 70 mm, the copper foil width L = 1550 mm, the thickness h = 6 μm, and the heat conduction diverter plate length L1 = 500 mm, can be obtained as N = 12, N2 = 8. At this time, wrinkles are observed in the width direction of the copper foil, and the copper foil as a whole has irregular shaking, indicating that when other conditions remain unchanged, further increase in the groove spacing and the center distance between adjacent heat diverter plate tuyere has a significant effect on the stability of wide and thin copper foil.

[0048] Example 5

[0049] Set the diameter of the air outlet d3 = 50mm, the heat conduction diverter groove And the number of single row air outlets The groove spacing d1 = 100mm, the center distance between the adjacent heat diverter plate tuyere d2 = 50mm, the copper foil width L = 1550mm, the thickness h = 6μm, and the heat conduction diverter plate length L1 = 800mm, can be obtained as N = 16, N2 = 17. At this time, there are no obvious wrinkles in the width direction of the copper foil, and there is no obvious jitter of the copper foil as a whole, indicating that when other conditions remain unchanged, the increase in the length of the heat conduction diverter plate has no obvious effect on the stability of the wide and thin copper foil.

[0050] In summary, the flotation performance of the present invention under different parameters can be seen. It also verifies that the present invention ensures the uniformity of heating of wide-width and thin copper foil, the adjustability of drying temperature and air volume, the adaptability of the flotation oven to copper foils of different widths, and the stability of operation.

Claims

1. An air flotation oven for copper foil surface treatment, comprising a housing (1), characterized in that: The outer surface of the box body (1) is provided with a fan (2) which is in communication with the interior of the box body (1); the interior of the box body (1) is provided with a first heat conduction diverter plate (4) and a second heat conduction diverter plate (7) which are arranged in parallel; the first heat conduction diverter plate (4) is provided in the upper cavity of the box body (1); the second heat conduction diverter plate (7) is provided in the lower cavity of the box body (1); a first side air outlet (13) and a second side air outlet (14) are provided on the side wall of the box body (1); and a first side air outlet (13) and a second side air outlet (14) are provided on the top wall of the box body (1). A first air inlet (11) and a second air inlet (12) are provided, and a first lower air outlet (15) and a second lower air outlet (16) are provided on the bottom wall of the box body (1); one end of the first air delivery duct (8) is connected to the first side air outlet (13), the other end of the first air delivery duct (8) is connected to the first lower air outlet (15), one end of the second air delivery duct (6) is connected to the second side air outlet (14), and the other end of the second air delivery duct (6) is connected to the second lower air outlet (16).

2. The air flotation oven for copper foil surface treatment according to claim 1, characterized in that: The first heat-conducting diverter plate (4) is provided with a first heat-conducting diverter plate groove (41) and a first heat-conducting diverter plate air outlet (42); the second heat-conducting diverter plate (7) is provided with a second heat-conducting diverter plate groove (71) and a second heat-conducting diverter plate air outlet (72); and heating tubes (3) are placed in both the first heat-conducting diverter plate groove (41) and the second heat-conducting diverter plate groove (71).

3. The air flotation oven for copper foil surface treatment according to claim 1, characterized in that: The width of the first heat-conducting diverter plate (4) and the second heat-conducting diverter plate (7) must be greater than the width of the copper foil by more than 400 mm.

4. The air flotation oven for copper foil surface treatment according to claim 2, characterized in that: The relationship between the number N of the first heat conducting diverter plate grooves 41 or the second heat conducting diverter plate grooves 71 and the copper foil width L (mm) is: Wherein, N is the number of the first heat conducting diverter plate grooves 41 or the second heat conducting diverter plate grooves 71; L (mm) is the width of the copper foil; d1 is the distance between the two grooves, and the range of d1 is 100-140 mm; the calculated result of N is rounded up; The number of rows of the first heat conducting diverter plate vents 42 and the second heat conducting diverter plate vents 72 is the same, set as N1 = N-1; the number of rows of vents in a single row Wherein, L1 is the length of the first heat conducting diverter plate 4 or the second heat conducting diverter plate 7; d2 ranges from 50 to 70 mm and is the center distance between adjacent first heat conducting diverter plate vents 42 or second heat conducting diverter plate vents 72, and the calculated result is rounded.

5. The air flotation oven for copper foil surface treatment according to claim 1, characterized in that: The first heat conduction diverter plate air outlet (42) and the second heat conduction diverter plate air outlet (72) are staggered.

6. The air flotation oven for copper foil surface treatment according to claim 2, characterized in that: The centers of the first side air outlet (13) and the second side air outlet (14) are aligned with the height of the copper foil (5).

7. The air flotation oven for copper foil surface treatment according to claim 1, characterized in that: The installation positions of the first air delivery duct (8) and the second air delivery duct (6) need to ensure that the copper foil is in the middle of the duct cross section, so that wind on the upper and lower surfaces of the copper foil can enter the duct.

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