A drying device for producing polyimide film

Abstract

The utility model discloses a drying device for polyimide film production, comprising a drying box body and a foot installed at the bottom of the drying box body, a drying chamber is arranged in the drying box body, a supporting roller for supporting the film is arranged at the bottom of the drying chamber, an air duct is arranged above the drying chamber, an air inlet and an air outlet of the air duct are arranged above the two ends of the drying chamber, a circulating fan is installed at the air inlet, an air outlet fan is installed at the air outlet, a drying box, an electric heating wire and a temperature sensor are installed in the air duct, an opening is arranged at the upper end of the drying box, a desiccant is filled in the drying box, an openable cover is arranged above the drying box, the drying box is installed at the front side of the electric heating wire, and the temperature sensor is located at the rear side of the electric heating wire; the utility model can effectively reuse the waste heat of the drying hot air by designing an air duct with a special structure, and has high thermal efficiency; at the same time, the drying wind direction is opposite to the film movement direction, so as to increase the contact time between the film and the drying wind and improve the drying uniformity.

Description

Technical Field

[0001] The utility model relates to the technical field of polyimide film production, in particular to a drying device for polyimide film production. Background Art

[0002] The polyimide film needs to be dried after the film drawing process to shape the film. The existing drying method mainly uses a nozzle to spray hot air flow to heat and dry the film. However, when using this method, the contact time between the film and the hot air flow is short, resulting in a short film drying time and low film drying quality. At the same time, the hot air flow cannot be fully and evenly diffused on the surface of the film, resulting in the inability to fully and evenly dry the film, affecting the film production quality. Utility Model Content

[0003] The utility model aims to provide a drying device for producing polyimide film.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] A drying device for producing polyimide film comprises a drying box and a foot installed at the bottom of the drying box, wherein a drying chamber is arranged in the drying box, a supporting roller for supporting a film is arranged at the bottom of the drying chamber, an air duct is arranged above the drying chamber, an air inlet and an air outlet of the air duct are arranged above the two ends of the drying chamber, a circulating fan is installed at the air inlet, an air outlet fan is installed at the air outlet, a drying box, an electric heating wire and a temperature sensor are installed in the air duct, an opening is arranged at the upper end of the drying box, a desiccant is filled in the drying box, an openable cover is arranged above the drying box, a side wall of the drying box is provided with evenly distributed mesh holes, the drying box is installed at the front side of the electric heating wire, and the temperature sensor is located at the rear side of the electric heating wire.

[0006] Furthermore, a filter is installed in the air duct on the front side of the heating wire.

[0007] Furthermore, the temperature sensor is installed at one end of the mounting rod, the other end of the mounting rod is fixedly connected to the drying box, and the temperature sensor is located in the middle of the air duct.

[0008] Furthermore, there are multiple temperature sensors, and the multiple temperature sensors are installed at different positions in the air duct.

[0009] Furthermore, the air outlet of the air duct is provided with a plurality of air outlet fans arranged side by side, and the air inlet of the air duct is also provided with a plurality of circulation fans arranged side by side.

[0010] Furthermore, the feed port of the drying box is provided with a detachable feed door, and the discharge port of the drying box is provided with a detachable discharge door.

[0011] Furthermore, a liquid outlet groove is provided at the position where the drying box is installed in the air duct.

[0012] In summary, the utility model has the following beneficial effects: the utility model can effectively reuse the waste heat of the drying hot air by designing an air duct with a special structure, with high thermal efficiency; at the same time, the drying wind direction is opposite to the movement direction of the film, thereby increasing the contact time between the film and the drying wind and improving the drying uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a structural diagram of the air outlet location.

[0015] In the figure, 1. base; 2. drying box body; 3. film; 4. support roller; 5. feed door; 6. discharge door; 7. exhaust fan; 8. circulation fan; 9. drying box; 10. desiccant; 11. cover plate; 12. liquid outlet tank; 13. air duct; 14. filter; 15. heating wire; 16. mounting rod; 17. temperature sensor; 18. air outlet. DETAILED DESCRIPTION

[0016] The utility model is further described in detail below in conjunction with the accompanying drawings, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] like Figure 1 and Figure 2 As shown, a drying device for polyimide film production comprises a drying box 2 and a base 1 installed at the bottom of the drying box 2, wherein a drying chamber is arranged in the drying box 2, a supporting roller 4 for supporting a film 3 is arranged at the bottom of the drying chamber, an air duct 13 is arranged above the drying chamber, an air inlet and an air outlet 18 of the air duct 13 are arranged above the two ends of the drying chamber, a circulating fan 8 is installed at the air inlet, an air outlet fan 7 is installed at the air outlet 18, a drying box 9, an electric heating wire 15 and a temperature sensor 17 are installed in the air duct 13, the upper end of the drying box 9 is opened, the drying box 9 is filled with a desiccant 10, an openable cover plate 11 is arranged above the drying box 9, the side wall of the drying box 9 is provided with evenly distributed mesh holes, the drying box 9 is installed in front of the electric heating wire 15, and the temperature sensor 17 is located at the rear of the electric heating wire 15.

[0018] Furthermore, a filter 14 is installed in the air duct 13 at the front side of the heating wire 15, and the filter 14 filters the air duct 13 to prevent it from adhering to the surface of the heating wire 15 and the temperature sensor 17 at the rear.

[0019] Furthermore, the temperature sensor 17 is installed at one end of the mounting rod 16 , and the other end of the mounting rod 16 is fixedly connected to the drying box 2 . The temperature sensor 17 is located in the middle of the air duct 13 .

[0020] Furthermore, there are multiple temperature sensors 17 , and the multiple temperature sensors 17 are installed at different positions in the air duct 13 .

[0021] Further, such as Figure 2 As shown, the air outlet 18 of the air duct 13 is provided with a plurality of air outlet fans 7 arranged side by side, and the air inlet of the air duct 13 is also provided with a plurality of circulation fans 8 arranged side by side. The arrangement and installation method of the air outlet fans 7 and the circulation fans 8 can be designed according to the shapes of the air outlet and the air inlet.

[0022] Furthermore, the feed port of the drying box 2 is provided with a detachable feed door 5 , and the discharge port of the drying box 2 is provided with a detachable discharge door 6 .

[0023] Furthermore, a liquid outlet groove 12 is provided at the position where the drying box 9 is installed in the air duct 13 , and when a large amount of liquid is adsorbed by the drying box 9 , the liquid can be slowly discharged from the liquid outlet groove 12 .

[0024] Working principle: the film to be dried enters the drying chamber from the feed port and is dried in contact with the hot air in the drying chamber. The dried hot air enters the air duct from the air inlet for circulation, passes through the drying box for drying, is heated by the electric heating wire, and finally enters the drying chamber through the air outlet for cyclic drying. The utility model can effectively reuse the waste heat of the drying hot air with high thermal efficiency. At the same time, the drying wind direction is opposite to the film movement direction, which increases the contact time between the film and the drying wind and improves the drying uniformity.

[0025] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as the modifications are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A drying device for polyimide film production, characterized in that: The invention comprises a drying box body (2) and a foot (1) installed at the bottom of the drying box body (2); a drying chamber is arranged in the drying box body (2); a supporting roller (4) for supporting a film (3) is arranged at the bottom of the drying chamber; an air duct (13) is arranged above the drying chamber; an air inlet and an air outlet (18) of the air duct (13) are arranged above the two ends of the drying chamber; a circulating fan (8) is installed at the air inlet; an air outlet fan (7) is installed at the air outlet (18); a drying box (9), an electric heating wire (15) and a temperature sensor (17) are installed in the air duct (13); the upper end of the drying box (9) is open; the drying box (9) is filled with a desiccant (10); an openable cover plate (11) is arranged above the drying box (9); the side wall of the drying box (9) is provided with evenly distributed mesh holes; the drying box (9) is installed in front of the electric heating wire (15); and the temperature sensor (17) is located at the rear of the electric heating wire (15).

2. A drying device for producing polyimide film according to claim 1, characterized in that: A filter screen (14) is installed in the air duct (13) on the front side of the heating wire (15).

3. A drying device for producing polyimide film according to claim 2, characterized in that: The temperature sensor (17) is mounted on one end of the mounting rod (16), the other end of the mounting rod (16) is fixedly connected to the drying box (2), and the temperature sensor (17) is located in the middle of the air duct (13).

4. A drying device for producing polyimide film according to claim 3, characterized in that: There are multiple temperature sensors (17), and the multiple temperature sensors (17) are installed at different positions in the air duct (13).

5. A drying device for producing polyimide film according to claim 4, characterized in that: The air outlet (18) of the air duct (13) is provided with a plurality of air outlet fans (7) arranged side by side, and the air inlet of the air duct (13) is also provided with a plurality of circulation fans (8) arranged side by side.

6. A drying device for producing polyimide film according to claim 5, characterized in that: The feed inlet of the drying box (2) is provided with a detachable feed door (5), and the discharge port of the drying box (2) is provided with a detachable discharge door (6).

7. A drying device for producing polyimide film according to claim 1, characterized in that: A liquid outlet groove (12) is provided at the position where the drying box (9) is installed in the air duct (13).

Images