CN112606287B - Polyimide curtain coating membrane drying equipment - Google Patents

Abstract

The invention proposes a polyimide casting film drying equipment, comprising: a drying box with an inlet and an outlet, and a conveying line located inside the drying box, the conveying line including a side-by-side arrangement from the inlet of the drying box to the outlet of the drying box The conveying roller, the sprockets and chains installed at both ends of the conveying roller, and the power mechanism, wherein: the inside of the drying box is provided with a first power chamber and a second power chamber which are arranged opposite to the two sides of the conveying roller in the arrangement direction; one end of the conveying roller Passing through the side wall of the first power chamber and extending into the first power chamber and setting a first rotary dynamic seal at the junction with the first power chamber, the other end of the conveying roller extends through the side wall of the second power chamber to the first power chamber. A second rotary dynamic seal is arranged in the second power chamber and is connected to the second power chamber; the sprocket and chain installed at one end of the transmission roller are located in the first power chamber, and the sprocket and chain installed at the other end of the transmission roller are located in the first power chamber. Second power room. The present invention can effectively avoid the problem of film contamination.

Description

A kind of polyimide casting film drying equipment

technical field

The invention relates to the technical field of casting film drying equipment, in particular to a polyimide casting film drying equipment.

Background technique

Polyimide film is a film made of organic polymer material, which has outstanding high temperature resistance, radiation resistance, chemical corrosion resistance and electrical insulation properties, suitable for flexible printed circuit board substrates and various high temperature resistance Electrical and electrical insulating materials are widely used in aviation, aerospace, electronics, liquid crystal and other fields. The production of polyimide film is divided into two steps. The first step is to synthesize polyamic acid solution, and the second step to synthesize polyamide The acid solution is cast, stretched, imidized and wound into a polyimide film. In the process of making the polyimide film, it needs to be dried, and it needs to be conveyed during the drying process. However, during the transmission process, the chain and the sprocket will inevitably generate a large amount of iron filings and dust due to friction during the operation. , and the generated iron filings and dust will fall on the film it conveys, thereby causing film pollution.

SUMMARY OF THE INVENTION

In order to solve the technical problems existing in the background art, the present invention proposes a drying equipment for polyimide cast film.

The polyimide casting film drying equipment proposed by the present invention includes: a drying box with an inlet and an outlet, and a conveying line located inside the drying box and conveying from the inlet of the drying box to the direction of its outlet. The line includes conveying rollers arranged side by side from the inlet of the drying box to the direction of its exit, sprockets and chains installed at both ends of the conveying rollers, and a power mechanism that drives each conveying roller to rotate synchronously through the chain, wherein:

The inside of the drying box is provided with a first power chamber and a second power chamber which are arranged opposite to the two sides of the conveying roller in the arrangement direction;

One end of the transfer roller extends into the first power chamber through the side wall of the first power chamber, and a first rotary dynamic seal is provided at the junction with the first power chamber, and the other end of the transfer roller passes through the side of the second power chamber The wall extends into the second power chamber and a second rotary dynamic seal is arranged at the connection with the second power chamber;

The sprocket and chain installed at one end of the transmission roller are located in the first power chamber, and the sprocket and chain installed at the other end of the transmission roller are located in the second power chamber.

Preferably, both the first power chamber and the second power chamber have air inlets that communicate with the outside world, and air passages connected to vacuum devices are respectively provided below the first power chamber and the second power chamber, and the first power chamber is There are exhaust ports communicating with the air passage below it and between the second power chamber and the air passage below it.

Preferably, a plurality of exhaust ports are provided, and each exhaust port is arranged below each sprocket in a one-to-one correspondence.

Preferably, the exhaust port is a flared mouth with upward flaring.

Preferably, a first dust brush contacting the chain is provided in the first power chamber and located at one end of the chain close to the outlet of the drying box.

Preferably, the first dust brush includes a base body and electrostatically charged bristles mounted on the base body and in contact with the chain.

Preferably, a second dust brush contacting the chain is provided in the second power chamber and located at one end of the chain close to the outlet of the drying box.

Preferably, the second dust brush includes a base body and electrostatically charged bristles mounted on the base body and in contact with the chain.

Preferably, both the first power chamber and the second power chamber are provided with electrostatic adsorption structures.

Preferably, both the first power chamber and the second power chamber are provided with a driving mechanism for driving the internal electrostatic adsorption structure to vibrate.

Preferably, the driving mechanism includes a vibration table, and the electrostatic adsorption structure is mounted on the vibration table.

Preferably, the electrostatic adsorption structure includes an electrostatic adsorption body and a controller for controlling the connection between the adsorption body and the power supply.

Preferably, the adsorption body includes an outer frame and an electrostatic adsorption film or an electrostatic adsorption net which is located inside the outer frame and whose outer edge is fixed to the outer frame.

In the present invention, the first power chamber and the second power chamber are arranged in the drying box, and the sprockets and the chains at both ends of the conveying roller are located in the first power chamber and the second power chamber respectively, so that the sprocket and the chain can be transmitted due to the transmission. The iron filings and dust caused by friction are enclosed in the corresponding power chamber, which can effectively avoid the problem of film contamination.

Description of drawings

FIG. 1 is a schematic structural diagram of a polyimide casting film drying equipment proposed by the present invention.

FIG. 2 is a partial enlarged view of S in FIG. 1 .

FIG. 3 is a partial enlarged view of K in FIG. 1 .

Detailed ways

1-3, a polyimide casting film drying equipment proposed by the present invention includes: a drying box 1 with an inlet and an outlet, and a drying box 1 located inside the drying box 1 and directed from the inlet of the drying box 1 to its outlet The conveying line for conveying includes conveying rollers 9 arranged side by side from the inlet of the drying box 1 to its outlet, sprockets 2 installed at both ends of the conveying rollers 9 and chains 3 connecting the sprockets 2, and The chain 3 drives the power mechanism for the synchronous rotation of the conveying rollers 9 , wherein: the inside of the drying box 1 is provided with a first power chamber and a second power chamber on both sides of the arrangement direction of the conveying rollers 9 opposite to each other.

One end of the transfer roller 9 extends into the first power chamber through the side wall of the first power chamber, and a first rotary dynamic seal is provided at the junction with the first power chamber, and the other end of the transfer roller 9 passes through the second power chamber The side wall extends into the second power chamber and a second rotary dynamic seal is arranged at the connection with the second power chamber, so as to isolate the first power chamber and the second power chamber from the inner space of the drying box 1. The sprocket 2 and chain 3 installed at one end of the transmission roller 9 are located in the first power chamber, and the sprocket 2 and chain 3 installed at the other end of the transmission roller 9 are located in the second power chamber, so that the friction between the sprocket 2 and the chain 3 produces iron. Chips and fugitive dust will not enter the interior space of the drying box 1 .

As can be seen from the above, in the present invention, the first power chamber and the second power chamber are arranged in the drying box 1, and the sprockets 2 and the chain 3 at both ends of the conveying roller 9 are located in the first power chamber and the second power chamber respectively, so as to make the The iron filings and dust caused by the transmission friction between the sprocket 2 and the chain 3 are enclosed in the corresponding power chamber, so that the problem of film pollution can be effectively avoided.

In addition, in this embodiment, both the first power chamber and the second power chamber have an air inlet a that communicates with the outside world, and an air passage 4 connected to a vacuum device is respectively provided below the first power chamber and the second power chamber , and between the first power chamber and the air passage 4 located below it, and between the second power chamber and the air passage 4 below it, there are exhaust ports b that communicate with the two. The first power chamber and the second power chamber can be evacuated by corresponding vacuuming devices respectively. The arrangement of this structure can not only centrally process the iron filings and dust in the first power room and the second power room, so as to avoid the iron filings. The wear of the sprocket 2 is accelerated too much, and because the air inlets a of the first power chamber and the second power chamber are both connected to the outside of the drying box 1 , the loss of nitrogen inside the drying box 1 can be avoided.

In this embodiment, the exhaust port b is a flared mouth with upward flaring, and there are multiple exhaust ports b, and each exhaust port b is arranged under each sprocket 2 in a one-to-one correspondence to perform fixed-point adsorption , enhance the adsorption effect.

In this embodiment, a first dust brush contacting the chain 3 is provided in the first power chamber and at one end of the chain 3 near the outlet of the drying box 1 . In the second power chamber and located at one end of the chain 3 near the outlet of the drying box 1, there is a second dust brush contacting the chain 3, so as to use the first dust brush and the second dust brush to respectively clean the chains 3 at both ends of the conveying roller 9. Do a sweep. And in this embodiment, the first dust brush and the second dust brush both include a base body 5 and bristles 6 mounted on the base body 5 and in contact with the chain 3 and charged with static electricity, so as to perform electrostatic adsorption during dust sweeping, Avoid dust when sweeping.

In this embodiment, the first power chamber and the second power chamber are provided with an electrostatic adsorption structure 7, and the electrostatic adsorption structure 7 includes an electrostatic adsorption body and a controller for controlling the connection between the adsorption body and the power supply. The adsorption body includes an outer frame and an electrostatic adsorption film or electrostatic adsorption net located inside the outer frame and fixed to the outer frame. The structure of the electrostatic adsorption structure 7 can effectively enhance the adsorption effect on iron chips and reduce the dust raising rate. And in this embodiment, the first power chamber and the second power chamber are respectively provided with a drive mechanism 8, the drive mechanism 8 includes a vibration table, and the adsorption body in the electrostatic adsorption structure 7 is installed on the vibration table, and the device is not installed. During operation, the electrostatic adsorption structure 7 can be cleaned regularly. The specific cleaning method is as follows: disconnect the power supply of the electrostatic adsorption structure 7 in advance, keep the vacuuming device in the vacuuming working state, and start the driving mechanism 8 to utilize the driving mechanism 8. The adsorption body is driven to shake to shake off the adsorbed material, and the waste that has been shaken off is drawn out by the vacuuming device.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (13)

1. A polyimide cast film drying apparatus, characterized by comprising: drying cabinet (1) with import and export and the transfer chain that is located inside drying cabinet (1) and carries out the conveying to its export direction by the import of drying cabinet (1), the transfer chain includes transfer roller (9) that the import by drying cabinet (1) arranged side by side to its export direction, install sprocket (2) and chain (3) at transfer roller (9) both ends and drive each transfer roller (9) synchronous rotation's power unit through chain (3), wherein:

a first power chamber and a second power chamber which are oppositely arranged at two sides of the arrangement direction of the conveying rollers (9) are arranged in the drying box (1);

one end of the conveying roller (9) penetrates through the side wall of the first power chamber to extend into the first power chamber, a first rotary dynamic seal is arranged at the joint of the conveying roller and the first power chamber, the other end of the conveying roller (9) penetrates through the side wall of the second power chamber to extend into the second power chamber, and a second rotary dynamic seal is arranged at the joint of the conveying roller and the second power chamber;

the chain wheel (2) and the chain (3) which are arranged at one end of the conveying roller (9) are positioned in the first power chamber, and the chain wheel (2) and the chain (3) which are arranged at the other end of the conveying roller (9) are positioned in the second power chamber.

2. The polyimide cast film drying apparatus according to claim 1, wherein each of the first power chamber and the second power chamber has an air inlet (a) communicating with the outside, air passages (4) connected with a vacuum extractor are provided below each of the first power chamber and the second power chamber, and exhaust ports (b) communicating the first power chamber and the air passage (4) located below the second power chamber are provided between the second power chamber and the air passage (4) located below the second power chamber.

3. The polyimide cast film drying apparatus according to claim 2, wherein the exhaust port (b) is provided in plurality, and each exhaust port (b) is arranged below each sprocket (2) in one-to-one correspondence.

4. The polyimide cast film drying apparatus according to claim 2, wherein the exhaust port (b) is a bell mouth with a flare directed upward.

5. The polyimide cast film drying apparatus according to claim 1, wherein a first dust brush in contact with the chain (3) is provided in the first power chamber at an end of the chain (3) near the outlet of the drying box (1).

6. Polyimide cast film drying apparatus according to claim 5, wherein the first sweeping brush comprises a base (5) and bristles (6) which are installed on the base (5) and are in contact with the chain (3) and are electrostatically charged.

7. The polyimide cast film drying apparatus according to claim 1, wherein a second dust brush in contact with the chain (3) is provided in the second power chamber at an end of the chain (3) near the outlet of the drying box (1).

8. The polyimide cast film drying apparatus according to claim 7, wherein the second dust brush includes a base (5) and bristles (6) which are installed on the base (5) and are in contact with the chain (3) and are electrostatically charged.

9. Polyimide cast film drying apparatus according to any of claims 1 to 8, wherein the inside of both the first and second power chambers is provided with an electrostatic adsorption structure (7).

10. The polyimide cast film drying apparatus according to claim 9, wherein the first power chamber and the second power chamber are each provided with a driving mechanism (8) for shaking the electrostatic adsorption structure (7) therein.

11. The polyimide cast film drying apparatus according to claim 10, wherein the driving mechanism (8) includes a vibrating table on which the electrostatic adsorption structure (7) is mounted.

12. The polyimide cast film drying apparatus according to claim 9, wherein the electrostatic adsorption structure (7) includes an adsorbent with static electricity and a controller for controlling on/off of the adsorbent and a power supply.

13. The polyimide cast film drying apparatus according to claim 12, wherein the adsorber includes an outer frame and an electrostatic adsorption film or an electrostatic adsorption net which is located inside the outer frame and whose outer edge is fixed to the outer frame.

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