CN116118079A

CN116118079A - Polyimide film colloid stripping device

Info

Publication number: CN116118079A
Application number: CN202310191375.XA
Authority: CN
Inventors: 鲁爱兵; 杨静晖; 唐昶宇
Original assignee: JIANGSU YABAO INSULATION MATERIAL CO Ltd
Current assignee: JIANGSU YABAO INSULATION MATERIAL CO Ltd
Priority date: 2023-03-02
Filing date: 2023-03-02
Publication date: 2023-05-16

Abstract

The invention relates to the field of polyimide film processing, in particular to a polyimide film colloid stripping device, at least three belt rollers are rotatably arranged in a box body, a plurality of steel belts are axially arranged and wound outside the belt rollers, wherein the upper parts of the two belt rollers stretching the steel belts form a horizontal bearing surface for coating PAA solution to form a PAA film, a motor is connected with one belt roller in a transmission way, the belt drives the belt to conduct the PAA film, the belt is provided with a shaft tube by rotating the side edge of the reversing surface by the horizontal bearing surface, the PAA film is conducted by a plurality of axially arranged steel belts in a right triangle profile, 90-degree angle differences exist between adjacent positions and two groups of elliptic wheels in alignment positions, the continuous change angle differences exist between the adjacent steel belts in the right angle turning positions, continuous stripping of the PAA film is realized, the two sides of the PAA film which are conducted vertically can contact with air flow, solvent evaporation is accelerated to solidify, and the adhesion between the PAA film and the steel belts is also destroyed in advance, so that the PAA film is convenient to separate from the steel belts after being completely solidified.

Description

Polyimide film colloid stripping device

Technical Field

The invention relates to the field of polyimide film processing, in particular to a polyimide film colloid stripping device.

Background

Polyimide film is PI film, which has more application, such as slot insulation of motor, cable wrapping material, transparent polyimide film can be used as soft solar cell bottom plate, polyimide fiber can be used for filtering hot gas, polyimide film production method includes dipping method, casting method and casting and stretching method;

the PI film is produced by casting method, which is to uniformly coat the defoaming polyamide acid (PAA) solution on a conductive steel belt to form a liquid film with uniform thickness, then enter a drying tunnel so as to gradually raise the temperature of the liquid film during drying, and the solvent gradually volatilizes, the polyamide acid film runs on the steel belt for a week along with the polyamide acid film, the solvent evaporates to become a solid film, the film stripped from the steel belt is guided to an imidizing furnace through a guide roller, and after imidization at high temperature, the film is wound by a winding machine to finish processing.

PAA solution coating and drying process is the important process of PI film shaping, and PAA liquid film shaping speed has direct relation with solvent volatilization, and PAA liquid film is hugged closely on the steel band surface in traditional production process, only relies on the liquid film surface volatilized solvent, and shaping efficiency remains to improve, and the whole solid process of liquid film is attached on the steel band surface moreover, causes PAA shaping film to peel off from the steel band when the surface produces the fold easily, has reduced PI film quality.

Disclosure of Invention

The invention aims to solve the following problems in the prior art: in the traditional production process, the PAA liquid film is tightly attached to the surface of the steel belt, the solvent volatilizes only by means of the outer surface of the liquid film, the shaping efficiency is to be improved, the whole solid-state process of the liquid film is attached to the surface of the steel belt, the PAA forming film is easy to cause the surface to generate wrinkles when being stripped from the steel belt, and the quality of the PI film is reduced.

In order to solve the problems in the prior art, the invention provides a polyimide film colloid stripping device, which comprises a box body, wherein at least three belt rollers are rotatably arranged in the box body, a plurality of steel belts are axially arranged and wound outside the belt rollers, the upper parts of the two belt rollers stretching the steel belts form a horizontal bearing surface for coating PAA solution to form a PAA film;

the motor is connected with one of the belt rollers in a transmission way and drives the steel belt to conduct the PAA film;

the steel belt is characterized in that the downward transmission surface of the horizontal bearing surface is a reversing surface, the side edge of the reversing surface is rotatably provided with a shaft tube, the surfaces of the shaft tube are axially provided with a plurality of elliptical wheels, the angle difference of the elliptical wheels at adjacent positions is 90 degrees, the arranged plurality of steel belts are aligned and wound outside the elliptical wheels, the steel belt at the reversing surface is inwards sunken, and the adjacent positions are supported by the elliptical wheels and have reversing angle differences.

Preferably, the two sets of shaft tubes are vertically arranged on the side edges of the reversing surface, the surfaces of the two sets of shaft tubes are provided with aligned elliptical wheels, the angle difference of the aligned elliptical wheels on the surfaces of the two sets of shaft tubes is 90 degrees, and the steel belt bypasses the elliptical wheels on the surfaces of the two sets of shaft tubes.

Preferably, the belt rollers of the reversing surface are vertically aligned to enable the PAA film at the reversing surface to be vertically downwards conducted, and the contact roller is rotated at the reversing surface position in the box body and is in contact with the downwards conducted PAA film.

Preferably, the air blowing component is arranged outside the box body, the air blowing component is in transmission connection with the motor, an air channel parallel to the inner wall of the box body is arranged at the bottom of the box body, the air exhaust end of the air blowing component is communicated with the air channel, and an air exhaust port is arranged at the top of the box body.

Preferably, the surface of the elliptical wheel and the shaft tube is provided with a plurality of air holes penetrating through the inner cavity of the shaft tube, and the exhaust end of the air blast assembly is communicated with the inner cavity of the shaft tube.

Preferably, two of the shaft tubes are internally provided with a core tube, the core tube is fixed with the box body, the surface of the core tube is provided with an axially extending strip opening, the strip opening on the surface of the upper core tube is aligned with the PAA film in the reversing surface at the corner position of the horizontal bearing surface and the reversing surface, and the strip opening on the surface of the lower core tube is aligned with the PAA film in the reversing surface.

Preferably, the surface of the steel belt, which contacts the belt roller, is fixed with a convex belt strip, the surface of the steel belt is provided with a belt groove, and the belt strip is adapted to be pressed into the belt groove.

Compared with the related art, the polyimide film colloid stripping device provided by the invention has the following advantages that

The beneficial effects are that:

according to the invention, a plurality of axially arranged steel belts are adopted to conduct the PAA film in a right triangle outline, two rows of elliptical wheels are arranged on the side edges of a vertical surface to restrict the steel belts to be conducted in a concave manner on a vertical surface, and 90-degree angle differences exist between the adjacent positions and the elliptical wheels at two groups of alignment positions, so that the angle differences of continuous changes exist between the adjacent steel belts at right angle turning positions, continuous stripping of the PAA film is realized, the two sides of the vertically conducted PAA film can be contacted with air flow, solvent evaporation is accelerated to conduct solidification, adhesion between the PAA film and the steel belts is also damaged in advance, the PAA film is convenient to separate from the steel belts after complete solidification, the complete form of the PAA film is maintained, and the polyimide film forming quality is improved.

Drawings

FIG. 1 is a schematic diagram of the overall external structure of the present invention;

FIG. 2 is a second overall external structure of the present invention;

FIG. 3 is a schematic view of the internal structure of the case of the present invention;

FIG. 4 is a schematic view of the conductive path structure of the steel strip of the present invention;

FIG. 5 is a schematic diagram of the pressed structure of the reversing surface steel strip of the present invention;

FIG. 6 is a schematic view of the contact structure of the elliptical wheel and the steel belt of the present invention;

FIG. 7 is a schematic diagram of a core barrel distribution structure according to the present invention;

fig. 8 is a schematic view of the positioning structure of the steel strip and the strip rolls of the present invention.

Reference numerals in the drawings: 1. a case; 11. a casting port; 12. an exhaust port; 13. a material port; 2. a motor; 3. a blower assembly; 31. an air duct; 4. a steel strip; 41. a belt roller; 42. a groove; 43. a strap; 5. PAA film; 51. a discharge roller; 6. a shaft tube; 61. an elliptical wheel; 62. a core barrel; 63. a strip opening; 64. air holes; 7. and (5) touching a roller.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Specific implementations of the invention are described in detail below in connection with specific embodiments.

Example 1

As shown in fig. 1-4, in a polyimide film colloid stripping device, three belt rollers 41 are rotatably installed in a box body 1, the three belt rollers 41 are distributed in a right triangle shape, a plurality of steel belts 4 are wound outside the three belt rollers 41, the steel belts 4 are axially arranged and distributed along the belt rollers 41, the steel belts 4 are in a right triangle shape, one right-angle side at the top of each steel belt 4 is a horizontal bearing surface, the other right-angle side of each steel belt 4 is a reversing surface vertically downwards, a motor 2 is installed outside the box body 1, and the motor 2 is connected with one belt roller 41 through belt transmission;

a casting opening 11 is arranged at the top of the box body 1 and is used for coating PAA solution on the surface of the steel belt 4 at the position of the horizontal bearing surface to form a PAA film 5, and the motor 2 is started to drive the belt roller 41 to rotate so that the steel belt 4 conducts the PAA film 5 from the horizontal bearing surface to the reversing surface;

an air duct 31 is formed in the bottom of the box body 1, the air duct 31 is provided with an opening parallel to the vertical inner wall and the inclined inner wall of the box body 1, the air blowing component 3 is arranged on the outer wall of the box body 1, the shaft end of the air blowing component 3 is connected with the motor 2 through belt transmission, the air exhaust end of the air blowing component 3 is communicated with the air duct 31 through a pipeline, an electric heating component is arranged at the air exhaust part of the air blowing component 3 and used for heating air, and an air exhaust port 12 is formed in the top of the box body 1;

when the motor 2 drives the steel belt 4 to conduct the PAA film 5, the air blast assembly 3 synchronously works, the electric heating assembly is matched to generate hot air to be led into the air duct 31, the hot air is conducted along the inner wall of the box body 1 to heat the PAA film 5, so that the solvent in the PAA film 5 is gradually volatilized, the PAA film 5 is gradually solidified, and the gas with the evaporated solvent is discharged from the exhaust port 12 and collected in a concentrated mode;

a feed opening 13 is formed in one end, far away from the reversing surface, of the box body 1, a feed discharging roller 51 is rotatably arranged on the inner side of the feed opening 13, the feed discharging roller 51 is in transmission connection with the belt roller 41 through a gear, the solidified PAA film 5 is separated from the steel belt 4 by the position of the feed discharging roller 51 and is led out through the feed opening 13, and the led-out PAA film 5 is sent into an imidization furnace;

as shown in fig. 3-6, two shaft tubes 6 are vertically and rotatably arranged at the position of the reversing surface inside the box body 1, the surfaces of the two shaft tubes 6 are axially arranged and fixed with a plurality of elliptical wheels 61, the angle difference of the elliptical wheels 61 at the adjacent positions is 90 degrees, the angle difference of the elliptical wheels 61 aligned with the surfaces of the two shaft tubes 6 is 90 degrees, the width of a single elliptical wheel 61 is the same as the width of a single steel belt 4, and the steel belt 4 is aligned around the surfaces of the elliptical wheels 61, so that the steel belt 4 at the position of the reversing surface is inwards recessed;

when the PAA film 5 is transferred from the horizontal bearing surface to the reversing surface, at the moment, the solvent in the PAA film 5 is partially volatilized, the PAA film 5 has certain curing strength, after the PAA film 5 is reversed, the angle difference exists between the adjacent elliptical wheels 61, so that the steel belt 4 is supported by the elliptical wheels 61, the whole surface of the steel belt 4 is separated, the continuously rotating shaft tube 6 enables the reversing angle of the single steel belt 4 supported by the elliptical wheels 61 to be continuously changed, the adjacent steel belt 4 alternately peels off the PAA film 5, the PAA film 5 is easily peeled off from the steel belt 4, the peeled PAA film 5 is vertically downwards conducted, the PAA film 5 and the steel belt 4 at the whole reversing surface part are in a separated state, at the moment, the two surfaces of the PAA film 5 can fully volatilize the solvent, the curing speed is accelerated, the PAA film 5 is attached to the steel belt 4 again after reaching the inclined surface of the steel belt 4, and the solvent is continuously volatilized;

the angle difference of the oval wheels 61 aligned on the surfaces of the two groups of shaft tubes 6 is 90 degrees, so that the two groups of oval wheels 61 balance the tension of the steel belt 4 in the rotating process, excessive change of the tension of the steel belt 4 is avoided, and the PAA film 5 is kept to be stably conducted;

example two

As shown in fig. 1-4, three belt rollers 41 are rotatably mounted in a box body 1, the three belt rollers 41 are distributed in a right triangle shape, a plurality of steel belts 4 are wound outside the three belt rollers 41, the steel belts 4 are axially distributed along the belt rollers 41, the steel belts 4 are in a right triangle shape, one right-angle side at the top of the steel belts 4 is a horizontal bearing surface, the other right-angle side of the steel belts 4 is a reversing surface vertically downwards, a motor 2 is mounted outside the box body 1, and the motor 2 is connected with one of the belt rollers 41 through belt transmission;

the difference is that: as shown in fig. 1 and 7, the two shaft tubes 6 are rotatably and adaptively provided with a core tube 62, the core tube 62 and the box 1 are kept fixed, one end of the core tube 62 penetrates out of the box 1 and is connected with the exhaust end of the air blast assembly 3 through a pipeline, the surfaces of the two core tubes 62 are provided with axially extending strip openings 63, the strip openings 63 on the surface of the upper core tube 62 align the PAA film 5 at the corner position of the horizontal bearing surface and the reversing surface, the strip openings 63 on the surface of the lower core tube 62 align the PAA film 5 in the reversing surface, and the surfaces of the elliptical wheel 61 and the shaft tube 6 are provided with a plurality of air holes 64 penetrating through the inner cavity of the shaft tube 6;

in the process of conducting the PAA film 5 by the steel belt 4, air flow generated by the air blast assembly 3 is led into the core barrel 62, in the rotating process of the elliptical wheel 61 and the shaft tube 6, air holes 64 on the surface of the elliptical wheel are circularly aligned with strip openings 63, air holes 64 on the surface of the upper elliptical wheel 61, which are directed to the conversion angle position of the PAA film 5, always pass through the strip openings 63, and the air flow passes through the air outlet holes 64 to be flushed to the conversion angle position of the PAA film 5, so that the separation of the PAA film 5 and the steel belt 4 is promoted;

the air holes 64 on the surface of the lower elliptical wheel 61 blow up the inner surface of the PAA film 5 which is vertically conducted, so that the solvent on the surface of the PAA film 5 is promoted to volatilize completely;

the touch roller 7 is rotated at the position of the reversing surface inside the box body 1, the touch roller 7 contacts the downward-conduction PAA film 5, the touch roller 7 increases the vertical conduction stability of the PAA film 5, and the PAA film 5 is prevented from being deviated under the action of air flow in the conduction process;

as shown in fig. 8, the surface of the steel strip 4 contacting the belt roller 41 is fixed with a convex strip 43, the surface of the steel strip 4 is provided with a groove 42, and the strip 43 is adapted to be pressed into the groove 42, so that when the steel strip 4 is driven by the belt roller 41, the accurate axial position is always kept, and the arranged steel strip 4 forms a complete plane on the horizontal bearing surface and the inclined surface for flatly attaching the PAA film 5.

Claims

1. A polyimide film colloidal peeling apparatus, comprising:

the device comprises a box body (1), wherein at least three belt rollers (41) are rotatably arranged in the box body (1), a plurality of steel belts (4) are axially arranged and wound outside the belt rollers (41), the upper parts of the two belt rollers (41) stretch the steel belts (4) to form a horizontal bearing surface for coating PAA solution to form a PAA film (5);

a motor (2), wherein the motor (2) is connected with one of the belt rollers (41) in a transmission way, and drives the steel belt (4) to conduct the PAA film (5);

the steel strip (4) is characterized in that the downward transmission surface of the steel strip (4) is a reversing surface, the side edge of the reversing surface is rotationally provided with the steel strip (6), the surfaces of the steel strip (4) are axially provided with a plurality of elliptical wheels (61), the angle difference of the elliptical wheels (61) at the adjacent positions is 90 degrees, and the arranged steel strips (4) are aligned and wound outside the elliptical wheels (61), so that the steel strip (4) at the reversing surface is inwards sunken, and the steel strip (4) at the adjacent positions is supported by the elliptical wheels (61) and has the reversing angle difference.

2. The polyimide film colloid peeling device according to claim 1, wherein two sets of shaft tubes (6) are vertically arranged on the side edges of the reversing surface, the surfaces of the two sets of shaft tubes (6) are respectively provided with an aligned elliptical wheel (61), the angle difference of the aligned elliptical wheels (61) on the surfaces of the two sets of shaft tubes (6) is 90 degrees, and the steel belt (4) bypasses the elliptical wheels (61) on the surfaces of the two sets of shaft tubes (6).

3. The polyimide film colloid peeling device according to claim 1, wherein the belt roller (41) of the reversing surface is vertically aligned to vertically downwards conduct the PAA film (5) at the reversing surface, a touch roller (7) is rotated at the reversing surface position inside the box body (1), and the touch roller (7) is contacted with the downwards conducted PAA film (5).

4. The polyimide film colloid stripping device according to claim 2, wherein the box body (1) is externally provided with a blowing component (3), the blowing component (3) is in transmission connection with the motor (2), the bottom of the box body (1) is provided with an air duct (31) parallel to the inner wall of the box body (1), the exhaust end of the blowing component (3) is communicated with the air duct (31), and the top of the box body (1) is provided with an exhaust port (12).

5. The polyimide film colloid peeling device according to claim 4, wherein a plurality of air holes (64) penetrating through the inner cavity of the shaft tube (6) are formed on the surfaces of the elliptical wheel (61) and the shaft tube (6), and the exhaust end of the air blast assembly (3) is communicated with the inner cavity of the shaft tube (6).

6. The polyimide film colloid peeling device according to claim 5, wherein two shaft tubes (6) are internally provided with a core tube (62), the core tube (62) is kept fixed with the box body (1), the surface of the core tube (62) is provided with an axially extending strip opening (63), the strip opening (63) on the surface of the upper core tube (62) is aligned with the PAA film (5) in the corner position of the horizontal bearing surface and the reversing surface, and the strip opening (63) on the surface of the lower core tube (62) is aligned with the PAA film (5) in the reversing surface.

7. The polyimide film colloidal peeling apparatus according to claim 1, wherein the surface of the steel belt (4) contacting the belt roller (41) is fixed with a protruding belt strip (43), the surface of the steel belt (4) is provided with a belt groove (42), and the belt strip (43) is adapted to be pressed into the belt groove (42).