A polyimide film drying device

Abstract

The present invention discloses a polyimide film drying device, including a drying box, a row of transmission rollers are arranged in the drying box, the film to be dried is driven by the transmission rollers, transmission seats are arranged on both sides of each transmission roller, the transmission seats on both sides are installed in the drying box through supporting mechanisms, driving mechanisms are arranged in the transmission seats on both sides, and driving rods of the driving mechanisms on both sides are correspondingly installed on both sides of the transmission rollers. The structural setting of the device is very clever, annular inner grooves are arranged on both sides of the transmission roller, and annular heating elements with uniform intervals are arranged on the transmission seats on both sides. The heating elements are suspended in the annular inner grooves, and the entire transmission roller can be heated. When the transmission roller rotates, the heating elements do not rotate in the annular inner grooves, which will neither hinder the rotation of the transmission roller nor affect the heating. This structure is more reasonable than traditional oil seal heating, water circulation heating, etc., and the direct heating effect on the transmission roller is also better.

Description

Technical Field

[0001] The invention belongs to the technical field of polyimide film production, and in particular relates to a polyimide film drying device. Background Art

[0002] In the existing drying mechanism of polyimide film, a high temperature device is arranged in the furnace body to make the temperature inside the furnace body high, and then various transmission rollers are arranged in the furnace body to dry the polyimide film during the transmission of the transmission rollers.

[0003] In the above technical scheme, the main drying and heating method is to increase the overall temperature of the furnace body. The overall temperature increase range is very large, and heat is very easy to lose. The generated heat is not used to dry the film at all and is lost to the outside, causing energy waste. It also leads to inaccurate and inconvenient temperature regulation. Moreover, due to the large range, the heating will be uneven, and there will be dead corners or hotter and weaker places.

[0004] In addition, in the prior art, when the polyimide film is transmitted on the transmission roller, the film has a certain degree of stickiness, and the film is likely to adhere to the roller during transmission, and forced transmission may cause damage to the film.

[0005] In addition, the existing drying device also dries and heats the film by setting a hair dryer to blow hot air from above the film. However, due to the strong wind force, the thickness of the film may change, and this method heats from the outside to the inside, and the bottom of the film is usually not easily heated, and the heating is not uniform and complete.

[0006] Therefore, in order to solve the above technical problems, it is necessary to develop a polyimide film temperature control mechanism that has uniform heating, precise temperature control, and convenient adjustment. Summary of the invention

[0007] Technical problem: In view of the above problems existing in the prior art, the technical problem to be solved by the present invention is to provide a polyimide film drying device.

[0008] Technical solution: In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0009] A polyimide film drying device comprises a drying box, wherein a row of transmission rollers are arranged in the drying box, and the film to be dried is driven by the transmission rollers, and transmission seats are arranged on both sides of each transmission roller, and the transmission seats on both sides are installed in the drying box through supporting mechanisms, and driving mechanisms are installed in the transmission seats on both sides, and driving rods of the driving mechanisms on both sides are installed on both sides of the transmission rollers;

[0010] The two side walls of the driving roller are further provided with annular inner grooves, which extend toward the inner side of the driving roller respectively, and are not connected to each other. The driving seats on both sides are provided with heating elements corresponding to the positions of the annular inner grooves, and the heating elements on both sides are arranged horizontally respectively, and the heating elements on the same side are arranged evenly at annular intervals, and the heating elements on both sides extend into the annular inner grooves on both sides respectively, and the heating elements are suspended in the annular inner grooves without contacting the annular inner grooves.

[0011] The surface of the driving roller is also provided with evenly spaced pores, which extend inward from the surface of the driving roller and are connected with the internal annular inner groove, and a heat collecting cover is also provided on the outside of the driving roller. The heat collecting cover is cylindrical and wraps the driving roller inside. A heat collecting gap is left between the heat collecting cover and the driving roller, and an air outlet notch is also provided on the heat collecting cover. The setting position of the air outlet notch corresponds to the position where the film is pressed on the driving roller. The hot air in the annular inner groove is discharged from the pores into the heat collecting cover, and then escapes from the air outlet notch of the heat collecting cover. The air outlet notch corresponds to the position of the film on the driving roller, so that the film is heated and dried.

[0012] Furthermore, there is a gap between the transmission seats on both sides and the middle transmission roller, and a blower mechanism is installed on the transmission seats on both sides. The blower mechanism extends into the gap through a blowing duct and can blow air into the gap and the annular inner groove.

[0013] Furthermore, the heat collecting cover is longer than the driving roller.

[0014] Furthermore, a temperature sensor is installed in the gap between the transmission roller and the transmission seats on both sides.

[0015] Furthermore, the air inlet of the hair dryer mechanism is provided with two branches, one branch is provided outside the drying box, and the air outside the drying box can be introduced into the interior of the transmission roller; the other branch is provided inside the drying box, and hot air circulation is realized inside the drying box; both branches are installed with electric control valves, and the corresponding drying boxes are also provided with air outlets.

[0016] Furthermore, a power supply device and a control device are also provided on the outside of the drying box; the power supply device provides power to the heating element, the driving mechanism and the blowing mechanism; the control device controls the support mechanism, the blowing mechanism, the driving mechanism, the heating element and the temperature sensor accordingly, and the control device can control the heating element through the temperature sensor to realize feedback regulation.

[0017] Furthermore, the heat collecting cover is installed on the bottom or upper wall of the drying box through a tripod.

[0018] Furthermore, ten heating elements are evenly spaced in the annular inner groove on each side; and the transmission roller is made of a heat-conducting metal material.

[0019] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0020] 1) The structure of the device is very clever. Annular inner grooves are set on both sides of the transmission roller, and annular heating elements with uniform intervals are set on the transmission seats on both sides. The heating elements are suspended in the annular inner grooves to heat the entire transmission roller. When the transmission roller rotates, the heating elements do not rotate in the annular inner grooves, which will neither hinder the rotation of the transmission roller nor affect the heating. This structure is more reasonable than traditional oil seal heating, water circulation heating, etc., and the direct heating effect on the transmission roller is also better;

[0021] 2) This device heats the transmission roller directly through the heating element, and sets a gap between the transmission roller and the transmission seat. The temperature sensor is installed in the gap. After the temperature is measured by the temperature sensor, the heating power of the internal heating element is directly adjusted through the control device. It is more accurate than the previous method of adjusting the overall air temperature of the furnace body, and directly controls the temperature of the transmission roller;

[0022] 3) In this device, the film is heated by directly heating the transmission roller, so the bottom of the film is heated and hardened first, and then the heat is conducted to the outside. The method of heating the bottom first is very reasonable, and the quality of the film is better after hardening;

[0023] 4) Both sides of the driving roller in this device are evenly heated by the heating elements in the annular inner groove, so the heating range of the film is large, and the temperature is very uniform, without dead corners;

[0024] 5) In this device, the driving roller is provided with air holes connected to the internal annular inner groove. After the heat generated in the annular inner groove is accumulated inside, it will escape from the air holes during the rotation of the driving roller. This device directly sets a heat collecting cover on the outside of the driving roller, and introduces the hot air into the air outlet notch through the heat collecting cover for discharge. The position of the air outlet notch corresponds to the position of the film on the driving roller. Therefore, the film can be dried and heated without wasting heat;

[0025] 6) In this device, a blowing mechanism is arranged on the transmission seat, and air is blown toward the inner annular inner groove through the blowing mechanism to make the hot air escape from the air holes. On the one hand, the blowing mechanism blows out the internal hot air to prevent the heat from accumulating and heating the film; on the other hand, the wind blown by the blowing mechanism also has a certain impact on the bottom of the film after being ejected from the air holes. First, it hardens quickly to prevent adhesion, and has a certain upward lifting force to prevent adhesion. In combination with the external heat collecting cover, the film can be dried quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 yes Figure 1 Middle AA section view;

[0028] Figure 3 yes Figure 1 Middle BB section view. DETAILED DESCRIPTION

[0029] The present invention is further illustrated below in conjunction with specific examples. The examples are implemented based on the technical solutions of the present invention. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, a polyimide film drying device comprises a drying box 1, a row of transmission rollers 2 are arranged in the drying box 1, and the film 15 to be dried is driven by the transmission rollers 2, and transmission seats 3 are correspondingly arranged on both sides of each transmission roller 2, and the transmission seats 3 on both sides are installed in the drying box 1 through supporting mechanisms 4, and driving mechanisms 5 are correspondingly installed in the transmission seats 3 on both sides, and driving rods of the driving mechanisms 5 on both sides are correspondingly installed on both sides of the transmission roller 2;

[0031] Both side walls of the driving roller 2 are further provided with annular inner grooves 6, which extend toward the inner side of the driving roller 2 respectively, and are not connected to each other. The driving seats 3 on both sides are provided with heating elements 7 corresponding to the positions of the annular inner grooves 6, and the heating elements 7 on both sides are arranged horizontally respectively, and the heating elements 7 on the same side are arranged evenly spaced in the annular direction, and the heating elements 7 on both sides extend into the annular inner grooves 6 on both sides respectively, and the heating elements 7 are suspended in the annular inner grooves 6 without contacting the annular inner grooves 6.

[0032] The surface of the driving roller 2 is also provided with evenly spaced pores 12, which extend inward from the surface of the driving roller 2 and are connected with the internal annular inner groove 6, and a heat collecting cover 8 is also provided on the outside of the driving roller 2. The heat collecting cover 8 is cylindrical and wraps the driving roller inside. A heat collecting gap is left between the heat collecting cover 8 and the driving roller, and an air outlet notch 9 is also provided on the heat collecting cover 8. The setting position of the air outlet notch 9 corresponds to the position where the film 15 is pressed on the driving roller 2. The hot air in the annular inner groove 6 is discharged from the pores into the heat collecting cover 8, and then escapes from the air outlet notch 9 of the heat collecting cover 8. The air outlet notch 9 corresponds to the position of the film 15 on the driving roller 2, so that the film 15 is heated and dried.

[0033] There is a gap between the transmission seats 3 on both sides and the middle transmission roller 2. A blower mechanism 10 is installed on the transmission seats 3 on both sides. The blower mechanism 10 extends into the gap through a blowing duct 11 and can blow air into the gap and the annular inner groove 6; the length of the heat collecting cover 8 is greater than the transmission roller 2.

[0034] A temperature sensor 13 is also installed in the gap between the transmission roller 2 and the transmission seats 3 on both sides.

[0035] The air inlet of the blower mechanism 10 is provided with two branches, one branch is provided outside the drying box 1, and the air outside the drying box 1 can be introduced into the interior of the driving roller 2; the other branch is provided inside the drying box 1, and hot air circulation is realized inside the drying box 1; both branches are installed with electric control valves, and the corresponding drying box 1 is also provided with an air outlet.

[0036] A power supply device and a control device are also provided on the outside of the drying box 1; the power supply device provides power to the heating element 7, the driving mechanism 5 and the blowing mechanism 10; the control device controls the support mechanism 4, the blowing mechanism 10, the driving mechanism 5, the heating element 7 and the temperature sensor 13 accordingly, and the control device can control the heating element 7 through the temperature sensor 13 to achieve feedback adjustment.

[0037] The heat collecting cover 9 is installed on the bottom or upper wall of the drying box 1 through a tripod 14; ten heating elements 7 are evenly spaced in the annular inner groove 6 on each side; and the driving roller 2 is made of a heat-conducting metal material.

[0038] The specific working principle of the temperature control mechanism of this device is as follows: when the film is heated and dried, Figure 1 As shown, the film is wound on the transmission roller and passed through the drying box by the transmission roller, and the entire film can be dried. The device does not set a heating element in the drying box, but sets a heating element inside the transmission roller.

[0039] A transmission seat is installed on both sides of each transmission roller. The rotation of the transmission roller is driven by the driving mechanisms on both sides. While driving, the heating elements on both sides are energized and heated at the same time. The heat generated is accumulated in the annular inner groove. The heat generated by the heating element is first conducted to heat the entire transmission roller. When the film is transmitted on the transmission roller, it is directly heated by the transmission roller, first heating the bottom of the film. After the bottom is heated, the heat is gradually transferred to the outside to dry the entire film. The structure is very reasonable.

[0040] The device is provided with annular inner grooves on both sides of the driving roller, and heating elements are provided in the annular inner grooves. The entire driving roller is heated, and the entire area of ​​the film is also heated accordingly. The heating range is large and the heating is very uniform.

[0041] In this device, the driving roller is provided with air holes connected to the internal annular groove. The heat generated in the annular groove accumulates inside and then escapes from the air holes during the rotation of the driving roller. This device directly sets a heat collecting cover on the outside of the driving roller, and introduces hot air into the air outlet notch through the heat collecting cover for discharge. The position of the air outlet notch corresponds to the position of the film on the driving roller. Therefore, the film can be dried and heated without wasting heat.

[0042] The device is also provided with a blower mechanism on the transmission seats on both sides. A gap is provided in the device. The blower mechanism can blow air into the gap and the annular inner groove and blow hot air out from the air holes. The blower mechanism can, on the one hand, blow hot air out from the annular inner groove to prevent heat accumulation, and directly heat the film after blowing it out, so as to achieve a better drying effect; on the other hand, under the action of wind force, the film can be prevented from sticking to the transmission roller, a force blowing inward is added from the inside of the transmission roller, and the power of the blower mechanism is set accordingly, and the power cannot be too large.

[0043] The structural setting of this device is very clever. Annular inner grooves are arranged on both sides of the transmission roller, and annular heating elements with uniform intervals are arranged on the transmission seats on both sides. The heating elements are suspended in the annular inner grooves to heat the entire transmission roller. When the transmission roller rotates, the heating elements do not rotate in the annular inner grooves, which will neither hinder the rotation of the transmission roller nor affect the heating. This structure is more reasonable than traditional oil seal heating, water circulation heating, etc., and the direct heating effect on the transmission roller is also better.

[0044] This device heats the transmission roller directly through a heating element, and sets a gap between the transmission roller and the transmission seat. The temperature sensor is installed in the gap. After the temperature is measured by the temperature sensor, the heating power of the internal heating element is directly fed back and adjusted through the control device. This is more accurate than the previous method of adjusting the overall air temperature of the furnace body, and directly controls the temperature of the transmission roller.

[0045] In this device, the film is heated by directly heating the transmission roller, so the bottom of the film is heated and hardened first, and then the heat is conducted to the outside. The method of heating the bottom first is very reasonable, and the quality of the film is better after hardening.

[0046] Both sides of the driving roller in the device are evenly heated by the heating elements in the annular inner groove, so the heating range of the film is large, and the temperature is very uniform without dead corners.

[0047] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A polyimide film drying device, comprising a drying box (1), wherein a row of transmission rollers (2) are arranged in the drying box (1), and a film (15) to be dried is driven by the transmission rollers (2), characterized in that: A transmission seat (3) is correspondingly provided on both sides of each transmission roller (2); the transmission seats (3) on both sides are installed in the drying box (1) through supporting mechanisms (4); driving mechanisms (5) are correspondingly installed in the transmission seats (3) on both sides; and driving rods of the driving mechanisms (5) on both sides are correspondingly installed on both sides of the transmission roller (2); The two side walls of the driving roller (2) are also provided with annular inner grooves (6), the annular inner grooves (6) on both sides extend toward the inner side of the driving roller (2), the annular inner grooves (6) on both sides are not connected, and heating elements (7) corresponding to the positions of the annular inner grooves (6) are provided on the driving seats (3) on both sides, the heating elements (7) on both sides are correspondingly arranged in the transverse direction, and the heating elements (7) on the same side are correspondingly arranged at even intervals in the annular direction, the heating elements (7) on both sides extend into the annular inner grooves (6) on both sides, and the heating elements (7) are suspended in the annular inner grooves (6) and do not contact the annular inner grooves (6); The surface of the driving roller (2) is also provided with evenly spaced pores (12), the pores (12) extending inward from the surface of the driving roller (2) and communicating with the internal annular inner groove (6), and the outside of the driving roller (2) is also provided with a heat collecting cover (8), the heat collecting cover (8) is cylindrical and wraps the driving roller inside, a heat collecting gap is left between the heat collecting cover (8) and the driving roller, and the heat collecting cover (8) is also provided with an air outlet notch (9), the setting position of the air outlet notch (9) corresponds to the position where the film (15) is pressed on the driving roller (2), the hot air in the annular inner groove (6) is discharged from the pores into the heat collecting cover (8), and then escapes from the air outlet notch (9) of the heat collecting cover (8), the air outlet notch (9) corresponds to the position of the film (15) on the driving roller (2), and the film (15) is heated and dried; A gap is left between the transmission seats (3) on both sides and the middle transmission roller (2), and a blower mechanism (10) is installed on the transmission seats (3) on both sides. The blower mechanism (10) extends into the gap through a blower pipe (11) and can blow air into the gap and the annular inner groove (6); The air inlet of the air blowing mechanism (10) is provided with two branches, one branch is provided outside the drying box (1) and can introduce air outside the drying box (1) into the interior of the driving roller (2); the other branch is provided inside the drying box (1) and realizes hot air circulation inside the drying box (1); both branches are equipped with electric control valves, and the corresponding drying boxes (1) are also provided with air outlets; A power supply device and a control device are also provided on the outside of the drying box (1); the power supply device provides power to the heating element (7), the driving mechanism (5) and the blower mechanism (10); the control device controls the support mechanism (4), the blower mechanism (10), the driving mechanism (5), the heating element (7) and the temperature sensor (13) to be connected accordingly, and the control device can control the heating element (7) through the temperature sensor (13) to achieve feedback regulation.

2. A polyimide film drying device according to claim 1, characterized in that: The heat collecting cover (8) is longer than the driving roller (2).

3. A polyimide film drying device according to claim 2, characterized in that: A temperature sensor (13) is also installed in the gap between the transmission roller (2) and the transmission seats (3) on both sides.

4. A polyimide film drying device according to claim 1, characterized in that: The heat collecting cover (9) is installed on the bottom or upper wall of the drying box (1) via a tripod (14).

5. The polyimide film drying device according to claim 1, characterized in that: Ten heating elements (7) are evenly spaced in the annular inner groove (6) on each side; and the transmission roller (2) is made of a metal material that can conduct heat.

Images