Secondary annealing furnace

Abstract

The secondary annealing furnace comprises a front conveying roller set and a rear conveying roller set, a film passing area is arranged between the front conveying roller set and the rear conveying roller set, an upper heating device is arranged above the film passing area, and a lower heating device is arranged below the film passing area. At least one of the upper heating device and the lower heating device is provided with a lifting mechanism. And the lifting mechanism is arranged at the bottom of the lower heating device and is a scissor type lifting mechanism. According to the utility model, the position relationship between the film passing area and the heating device can be conveniently changed through the lifting mechanism, so that the heating effect before the film passes through the area is changed to cope with films of different varieties and different requirements.

Description

Technical Field

[0001] This utility model relates to the field of thin film production equipment, and in particular to a secondary annealing furnace used for secondary annealing to eliminate internal stress in thin films and improve the tensile strength of thin films. Background Technology

[0002] In the film production process, especially after the PI film is formed, in order to eliminate the internal stress of the film and improve the tensile strength of the film, it is often necessary to perform secondary annealing on the finished film, that is, to heat the finished film a second time.

[0003] Existing heating devices typically use heating tubes for heating, but their structure is usually fixed, with the position between the film and the heating tube fixed. In actual production, the requirements for secondary annealing often differ for products of different thicknesses and types. It is very inconvenient to adjust the heating position in existing equipment, and there is still room for improvement in its structure. Utility Model Content

[0004] The main objective of this invention is to provide a secondary annealing furnace that allows for convenient changes in the heating position.

[0005] The technical means adopted in this utility model are as follows. A secondary annealing furnace includes a front conveying roller group and a rear conveying roller group. Between the front conveying roller group and the rear conveying roller group is a film passing area. An upper heating device is arranged above the film passing area, and a lower heating device is arranged below the film passing area. At least one of the upper heating device and the lower heating device is provided with a lifting mechanism.

[0006] The lifting mechanism is located at the bottom of the lower heating device, and it is a scissor-type lifting mechanism.

[0007] The upper and lower heating devices are heating boxes, and several parallel heating tubes are installed inside the heating boxes. The length of the heating tubes matches the width of the area through which the film passes.

[0008] An air extraction device is installed above the heating box.

[0009] The front conveyor roller group and the rear conveyor roller group include at least two sets of guide rollers, namely a front upper guide roller and a front lower guide roller located opposite to the front upper guide roller, and a rear upper guide roller and a rear lower guide roller located opposite to the rear upper guide roller. The front upper guide roller and the rear upper guide roller are arranged on the same plane.

[0010] It includes a fixed support, which includes longitudinal columns, and front upper guide rollers and rear upper guide rollers are movably arranged between the longitudinal columns.

[0011] The beneficial effects of this invention are as follows: The lifting mechanism allows for convenient alteration of the positional relationship between the film-passing area and the heating device, thereby changing the heating effect before the film passes through the area to accommodate different types and requirements of film. Furthermore, a similar effect can be achieved by changing the position of the film through the suction device, the front conveyor roller group, and the rear conveyor roller group, thereby altering the film's position. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0013] Figure 2 This is a side sectional view of the present invention. Detailed Implementation

[0014] Please see Figure 1 and Figure 2 As shown, this utility model discloses a secondary annealing furnace, comprising a front conveyor roller group 1 and a rear conveyor roller group 2. Between the front conveyor roller group 1 and the rear conveyor roller group 2 is a film passage area 3 through which the finished film, such as PI film 10, passes. The key feature is that an upper heating device 4 is positioned above the film passage area 3, and a lower heating device 5 is positioned below it. At least one of the upper heating device 4 and the lower heating device 5 is equipped with a lifting mechanism A. By changing the relative distance between the upper and lower heating devices through the lifting mechanism, the distance to the film in the film passage area is changed, thereby adjusting the heating effect. This allows for convenient adjustment of secondary annealing for films of different thicknesses, requirements, and types, improving the overall production efficiency. The upper heating device 4 and the lower heating device 5 are heating chamber structures, with several parallel heating tubes 6 arranged inside. The length of the heating tubes 6 matches the width of the film passage area 3 for better heating of the film; generally, they are slightly wider than the film width. Of course, the heating method here can also be other heating methods such as ceramic heating plate, heating wire, heating lamp or hot air.

[0015] In this embodiment, the lifting mechanism A is located at the bottom of the lower heating device 5, and this lifting mechanism is a scissor-type lifting mechanism. Of course, other lifting methods can also be used, such as hydraulic rods, robotic arms, etc.

[0016] An exhaust device 7 can be installed above the upper heating box to discharge hot air as needed. Through the exhaust function, the overall heating atmosphere of the membrane passing through area 3 can also be controlled to a certain extent.

[0017] Furthermore, the front conveying roller group 1 and the rear conveying roller group 2 include at least two sets of guide rollers, namely a front upper guide roller 11 and a front lower guide roller 12 located opposite to the front upper guide roller 11, and a rear upper guide roller 21 and a rear lower guide roller 22 located opposite to the rear upper guide roller 21. The front upper guide roller 11 and the rear upper guide roller 21 are arranged on the same plane, and the final film is located on the front upper guide roller 11 and the rear upper guide roller 21.

[0018] In the accompanying drawings of this embodiment, a fixed bracket 8 may be included. The fixed bracket 8 includes at least a longitudinal column 81. The front upper guide roller 11 and the rear upper guide roller 21 are movably arranged between the longitudinal column, which can change the height and also serve to adjust the position of the film and the upper and lower heating devices. The adjustment method here can be a number of holes located on the longitudinal column, or a sliding track, etc., which are all easily implemented by those skilled in the art.

Claims

1. A secondary annealing furnace, comprising a front conveying roller group and a rear conveying roller group, wherein a film passing area is located between the front conveying roller group and the rear conveying roller group, characterized in that, The film passes through an area with an upper heating device above it and a lower heating device below it. At least one of the upper heating device and the lower heating device is equipped with a lifting mechanism.

2. The secondary annealing furnace as described in claim 1, characterized in that, The lifting mechanism is located at the bottom of the lower heating device, and it is a scissor-type lifting mechanism.

3. The secondary annealing furnace as described in claim 2, characterized in that, The upper and lower heating devices are heating boxes, and several parallel heating tubes are installed inside the heating boxes. The length of the heating tubes matches the width of the area through which the film passes.

4. The secondary annealing furnace as described in claim 3, characterized in that, An air extraction device is installed above the upper heating box.

5. The secondary annealing furnace as described in claim 1, characterized in that, The front conveyor roller group and the rear conveyor roller group include at least two sets of guide rollers, namely a front upper guide roller and a front lower guide roller located opposite to the front upper guide roller, and a rear upper guide roller and a rear lower guide roller located opposite to the rear upper guide roller. The front upper guide roller and the rear upper guide roller are arranged on the same plane.

6. The secondary annealing furnace as described in claim 5, characterized in that, It includes a fixed support, which includes longitudinal columns, and front upper guide rollers and rear upper guide rollers are movably arranged between the longitudinal columns.

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