Double-layer polyimide film production equipment and process for electronic flexible display substrate

Abstract

The invention provides a double-layer polyimide film production device and process for an electronic flexible display substrate, and belongs to the technical field of double-layer polyimide film production, the double-layer polyimide film production device comprises a base, two supporting frames are arranged on the base, one supporting frame is fixedly installed on the base, and the other supporting frame is detachably installed on the base; a winding mechanism is arranged between the two supporting frames. According to the winding mechanism, the supporting ring capable of automatically changing the diameter is additionally arranged on the basis of original winding, so that the diameter of a winding shaft can be automatically adjusted according to parameters such as the wall thickness of the polyimide film without repeatedly replacing a winding roller for different polyimide films during winding, and the winding efficiency is improved. Compared with the prior art, the winding shaft does not need to be manually and frequently replaced, the production efficiency and flexibility are greatly improved, meanwhile, through accurate tension and speed control, it can be ensured that the imide film is kept uniform and compact in the winding process, and the loosening or overlapping phenomenon is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of double-layer polyimide film production, in particular to double-layer polyimide film production equipment and process for electronic flexible display substrates. Background Art

[0002] The double-layer polyimide film inherits many advantages of the polyimide material itself, including excellent insulation, high-temperature stability, good mechanical properties and outstanding chemical stability. These characteristics enable the double-layer polyimide film to maintain stable performance in extreme environments and usage scenarios.

[0003] After searching, in the prior art, the Chinese patent with patent announcement number CN217555362U discloses "a kind of polyimide film production equipment, which relates to the technical field of polyimide film production, including a winding device and a cutting device, the cutting device is arranged on the right side of the winding device, the winding device includes a base and a support frame, the lower end of the support frame is fixedly connected with an adjustment block, the support frame is slidably connected with the base through the adjustment block, the inner side of the upper end of the support frame is rotatably connected with a rotating shaft, the inner side of the rotating shaft is slidably connected with a guide rod, the end of the guide rod away from the rotating shaft is fixedly connected with a fixed plate, and a winding roller is arranged between the fixed plates. This invention facilitates the winding of the polyimide film by arranging a winding device, and the winding rollers of different lengths are clamped and fixed by the support frame and the fixed plate after the support frame is adjusted. When winding polyimide films of different sizes, the winding of the polyimide film can be achieved by replacing winding rollers of different lengths, which is highly practical", but there are still the following defects:

[0004] This invention rolls up the polyimide film by means of a winding roller with a fixed diameter. However, when rolling up polyimide films of different thicknesses, it is necessary to repeatedly replace winding rollers with different diameters, and the diameter cannot be changed on the original basis, which makes the rolling process more complicated. Therefore, a double-layer polyimide film production device and process for electronic flexible display substrates are proposed. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that when winding polyimide films of different thicknesses, winding rollers of different diameters need to be repeatedly replaced and the diameter cannot be changed on the original basis, making the winding process more complicated.

[0006] In order to achieve the above-mentioned invention objectives, the present invention provides the following technical solutions: a double-layer polyimide film production device for an electronic flexible display substrate, comprising a base, on which two groups of support frames are arranged, one group of the support frames is fixedly mounted on the base, and the other group of the support frames can be disassembled on the base, and a winding mechanism is arranged between the two groups of the support frames.

[0007] The winding mechanism includes a first reduction motor, a rotating shaft, a winding roller, a planetary carrier, a planetary gear, a connecting frame, a gear ring, a second reduction motor, a driving wheel, a rack and a supporting ring. The first reduction motor is fixedly mounted on the outside of a group of support frames, the rotating shaft is located between the two groups of support frames, and one end is cooperated and mounted on the output end of the first reduction motor, the winding roller is mounted on the rotating shaft and rotates with the rotating shaft, the center of the planetary carrier is rotatably mounted on the rotating shaft, the number of the planetary gears is three groups, and they are respectively rotatably mounted on the outer end of the planetary carrier, the connecting frame is rotatably connected to the rotating shaft, one side end face of the gear ring is fixedly connected to the connecting frame, the second reduction motor is fixedly mounted on one side of the support frame, the driving wheel is cooperated and arranged at the output end of the second reduction motor, the rack is arranged between the planetary carrier and the gear ring, and is embedded in one side of the planetary carrier for guidance on the planetary carrier, and the supporting ring is fixedly arranged on the outer end of the rack.

[0008] As a preferred technical solution of the present invention, a cutting frame is fixedly arranged on the base on one side, two groups of cylinders are fixedly arranged on the top of the cutting frame, and a cutting knife is installed at the bottom output end of the cylinder.

[0009] As a preferred technical solution of the present invention, the planetary gear, the ring gear, the driving wheel and the rack are meshed with each other.

[0010] As a preferred technical solution of the present invention, the number of the support rings is three groups, and the three groups of support rings form a complete circular ring when fully closed.

[0011] As a preferred technical solution of the present invention, a connecting ring is provided on the side of a group of the supporting frames, and the connecting ring is used to rotatably mount one end of the rotating shaft on the supporting frame.

[0012] As a preferred technical solution of the present invention, the winding mechanism is symmetrically arranged at both ends of the rotating shaft.

[0013] As a preferred technical solution of the present invention, the planet carrier and the connecting frame are symmetrically arranged on both sides of the ring gear, and the planet carrier and the connecting frame are both made of stainless steel.

[0014] A production process of a double-layer polyimide film for an electronic flexible display substrate, the specific steps are as follows:

[0015] Step 1: Select raw materials: select 40-50 parts by weight of hexafluorodianhydride, 30-40 parts by weight of hexafluorodiamine, 30-35 parts by weight of N-methylpyrrolidone, 4-7 parts by weight of nano-nitrogen silica, 3-6 parts by weight of nano-alumina, 4-8 parts by weight of nano-silicon oxide, and 4-6 parts by weight of nano-filler;

[0016] Step 2: mixing hexafluorodianhydride and hexafluorodiamine with N-methylpyrrolidone to carry out condensation polymerization to obtain a polyamic acid solution;

[0017] Step 3: adding nano-nitrogen silica, nano-aluminum oxide, nano-silicon oxide and nano-filler to the polyamic acid solution to obtain a polyamic acid mixed solution;

[0018] Step 4: Casting the polyamic acid mixed solution into a film, or immersing it in an imidization reagent to perform a first imidization reaction;

[0019] Step 5: biaxially stretching the obtained polyamic acid cast film or the product of the first imidization reaction to obtain a polyimide stretched film;

[0020] Step 6: Under the condition of gradient temperature increase, the polyimide stretched film is subjected to a second imidization reaction to finally obtain a polyimide film;

[0021] Step 7: Stack the two layers of polyimide film together and use a double-layer polyimide film production device for electronic flexible display substrates to evenly and tightly roll them up.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. Through the winding mechanism, a support ring that can automatically change the diameter is added on the basis of the original winding. Therefore, when winding, for different polyimide films, there is no need to repeatedly replace the winding roller. The diameter of the winding shaft can be automatically adjusted according to parameters such as the wall thickness of the polyimide film, and there is no need to frequently replace the winding shaft manually, which greatly improves production efficiency and flexibility.

[0024] 2. At the same time, through precise tension and speed control, it can ensure that the imide film remains uniform and tight during the winding process, avoiding relaxation or overlapping, thereby improving the winding quality. It can be customized according to the specific needs of customers, such as winding length, winding speed, etc., to adapt to different application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is one of the overall structural schematic diagrams of the present invention;

[0026] Figure 2 This is the second schematic diagram of the overall structure of the present invention;

[0027] Figure 3 It is one of the partial structural schematic diagrams of the present invention;

[0028] Figure 4 This is the second schematic diagram of the partial structure of the present invention;

[0029] Figure 5 This is the third schematic diagram of the partial structure of the present invention;

[0030] Figure 6It is a schematic structural diagram of the winding mechanism of the present invention.

[0031] In the figure: 1. base; 2. support frame; 3. winding mechanism; 301. first reduction motor; 302. rotating shaft; 303. winding roller; 304. planetary frame; 305. planetary gear; 306. connecting frame; 307. gear ring; 308. second reduction motor; 309. driving wheel; 310. rack; 311. supporting ring; 4. cutting frame; 5. cylinder; 6. cutting knife; 7. connecting ring. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0033] like Figure 1-6 As shown, this embodiment proposes a double-layer polyimide film production device for electronic flexible display substrates, including a base 1, on which two groups of support frames 2 are arranged, one group of support frames 2 is fixedly installed on the base 1, and the other group of support frames 2 can be disassembled on the base 1, and a winding mechanism 3 is arranged between the two groups of support frames 2.

[0034] like Figure 5 and Figure 6As shown, the winding mechanism 3 includes a first reduction motor 301, a rotating shaft 302, a winding roller 303, a planetary frame 304, a planetary gear 305, a connecting frame 306, a gear ring 307, a second reduction motor 308, a driving wheel 309, a rack 310 and a supporting ring 311. The first reduction motor 301 is fixedly mounted on the outside of a group of support frames 2, the rotating shaft 302 is located between the two groups of support frames 2, and one end is matched and mounted on the output end of the first reduction motor 301. The winding roller 303 is mounted on the rotating shaft 302 and rotates with the rotating shaft 302. The center of the planetary frame 304 is rotated and mounted on the rotating shaft 302. On the rotating shaft 302, there are three groups of planetary gears 305, which are rotatably installed on the outer ends of the planetary carrier 304 respectively. The connecting frame 306 is rotatably connected to the rotating shaft 302. The end face of one side of the ring gear 307 is fixedly connected to the connecting frame 306. The second reduction motor 308 is fixedly installed on one side of the support frame 2. The driving wheel 309 is cooperatively arranged at the output end of the second reduction motor 308. The rack 310 is arranged between the planetary carrier 304 and the ring gear 307, and is embedded in one side of the planetary carrier 304 for guidance on the planetary carrier 304. The support ring 311 is fixedly arranged on the outer end of the rack 310. In the ordinary winding process, a winding roller 303 with a fixed diameter is selected and installed on the rotating shaft 302. At this time, the support rings 311 at both ends of the rotating shaft 302 shrink to be flush with the circumferential surface of the winding roller 303; when the winding radius needs to be changed, the second reduction motor 308 works to drive the driving wheel 309 to rotate, and the driving wheel 309 drives the ring gear 307 to rotate, and then the outer planetary wheel 305 is driven to rotate through the ring gear 307, and the engagement between the planetary wheel 305 and the rack 310 drives the rack 310 to expand outward, thereby driving the support ring 311 to expand outward, so that the radius of the support ring 311 at both ends of the rotating shaft 302 becomes larger, and the polyimide film is laid on the support ring 311, and then the first reduction motor 301 drives the entire rotating shaft 302 to rotate for winding. There is no need to replace the winding roller 303 during the entire winding process.

[0035] like Figure 1 As shown, a cutting frame 4 is fixedly arranged on one side of the base 1, two groups of cylinders 5 are fixedly arranged on the top of the cutting frame 4, and a cutting knife 6 is installed at the bottom output end of the cylinder 5. Before the polyimide film is rolled up, it passes through the bottom of the cutting knife 6. After the rolling is completed, the cylinder 5 drives the cutting knife 6 to move and cut the polyimide film.

[0036] like Figure 6 As shown, the planetary gear 305, the ring gear 307, the driving wheel 309 and the rack 310 are meshed with each other to ensure the overall stability during the diameter change process.

[0037] like Figure 3As shown, there are three groups of support rings 311, and the three groups of support rings 311 form a complete ring when fully closed, ensuring that when the support rings 311 retract to the minimum radius, they form a ring without gaps, and the polyimide film can be rolled up better.

[0038] like Figure 3 As shown, a connecting ring 7 is provided on the side of a group of support frames 2, and the connecting ring 7 is used to rotatably mount one end of the rotating shaft 302 on the support frame 2. Before winding, a group of support frames 2 is installed on the base 1 so that both ends of the rotating shaft 302 can rotate between the support frames 2 on both sides, and one end of the rotating shaft 302 is installed through the connecting ring 7. After winding, the connecting ring 7 is removed, and the support frame 2 on one side is removed, so that the winding roller 303 that has been wound up can be removed from the rotating shaft 302.

[0039] like Figure 3 As shown, the winding mechanism 3 is symmetrically arranged at both ends of the rotating shaft 302, so as to ensure that the two ends can change evenly during the process of adjusting the winding radius.

[0040] like Figure 6 As shown, the planet carrier 304 and the connecting frame 306 are symmetrically arranged on both sides of the gear ring 307, and both the planet carrier 304 and the connecting frame 306 are made of stainless steel, thereby improving the service life and connection strength of the planet carrier 304 and the connecting frame 306.

[0041] A production process of a double-layer polyimide film for an electronic flexible display substrate, the specific steps are as follows:

[0042] Step 1: Select raw materials: select 40-50 parts by weight of hexafluorodianhydride, 30-40 parts by weight of hexafluorodiamine, 30-35 parts by weight of N-methylpyrrolidone, 4-7 parts by weight of nano-nitrogen silica, 3-6 parts by weight of nano-alumina, 4-8 parts by weight of nano-silicon oxide, and 4-6 parts by weight of nano-filler;

[0043] Step 2: mixing hexafluorodianhydride and hexafluorodiamine with N-methylpyrrolidone to carry out condensation polymerization to obtain a polyamic acid solution;

[0044] Step 3: adding nano-nitrogen silica, nano-aluminum oxide, nano-silicon oxide and nano-filler to the polyamic acid solution to obtain a polyamic acid mixed solution;

[0045] Step 4: Casting the polyamic acid mixed solution into a film, or immersing it in an imidization reagent to perform a first imidization reaction;

[0046] Step 5: biaxially stretching the obtained polyamic acid cast film or the product of the first imidization reaction to obtain a polyimide stretched film;

[0047] Step 6: Under the condition of gradient temperature increase, the polyimide stretched film is subjected to a second imidization reaction to finally obtain a polyimide film;

[0048] Step 7: stack the two layers of polyimide film together, and use a double-layer polyimide film production device for electronic flexible display substrates to evenly and tightly roll them up;

[0049] Specifically, when the double-layer polyimide film production equipment for electronic flexible display substrate is used: a set of support frames 2 are installed on the base 1, so that the two ends of the rotating shaft 302 can rotate between the support frames 2 on both sides, one end of the rotating shaft 302 is installed through the connecting ring 7, and the polyimide film passes through the bottom of the cutting knife 6 and is rolled up by the winding roller 303. At this time, the support rings 311 at both ends of the rotating shaft 302 are contracted to be flush with the circumference of the winding roller 303, and the winding radius is the winding radius of the winding roller 303. When the winding radius needs to be changed, the second reduction motor 308 works to drive the driving wheel 309 to rotate, and the driving wheel 30 9 drives the ring gear 307 to rotate, and then drives the outer planetary gear 305 to rotate through the ring gear 307, and through the engagement between the planetary gear 305 and the rack 310, drives the rack 310 to expand outward, thereby driving the support ring 311 to expand outward, so that the radius of the support rings 311 at both ends of the rotating shaft 302 becomes larger, and the first reduction motor 301 drives the entire rotating shaft 302 to rotate to perform the winding work. When the winding is completed, the cylinder 5 drives the cutting knife 6 to move to cut the polyimide film, remove the connecting ring 7, and remove the support frame 2 on one side, so that the winding roller 303 that has been wound can be removed from the rotating shaft 302.

[0050] All technical features in this embodiment can be freely combined according to actual needs.

[0051] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A double-layer polyimide film production device for electronic flexible display substrate, comprising a base (1), characterized in that: Two groups of support frames (2) are arranged on the base (1), one group of the support frames (2) is fixedly mounted on the base (1), and the other group of the support frames (2) can be detached from the base (1), and a winding mechanism (3) is arranged between the two groups of the support frames (2); The winding mechanism (3) comprises a first reduction motor (301), a rotating shaft (302), a winding roller (303), a planetary frame (304), a planetary gear (305), a connecting frame (306), a gear ring (307), a second reduction motor (308), a driving wheel (309), a rack (310) and a supporting ring (311), wherein the first reduction motor (301) is fixedly mounted on the outside of a group of supporting frames (2), the rotating shaft (302) is located between the two groups of supporting frames (2), and one end is matched and mounted on the output end of the first reduction motor (301), the winding roller (303) is mounted on the rotating shaft (302) and rotates with the rotating shaft (302), and the center of the planetary frame (304) is rotatably mounted on the rotating shaft (302). On the shaft (302), the number of the planetary gears (305) is three groups, and they are respectively rotatably mounted on the outer ends of the planetary frame (304), the connecting frame (306) is rotatably connected to the rotating shaft (302), one end face of the ring gear (307) is fixedly connected to the connecting frame (306), the second reduction motor (308) is fixedly mounted on one side of the support frame (2), the driving wheel (309) is cooperatively arranged at the output end of the second reduction motor (308), the rack (310) is arranged between the planetary frame (304) and the ring gear (307), and is embedded in one side of the planetary frame (304) to guide on the planetary frame (304), and the support ring (311) is fixedly arranged on the outer end of the rack (310).

2. The double-layer polyimide film production equipment for electronic flexible display substrate according to claim 1, characterized in that: A cutting frame (4) is fixedly arranged on the base (1) on one side, two groups of cylinders (5) are fixedly arranged on the top of the cutting frame (4), and a cutting knife (6) is installed at the bottom output end of the cylinder (5).

3. The double-layer polyimide film production equipment for electronic flexible display substrate according to claim 1, characterized in that: The planetary gear (305), the ring gear (307), the driving gear (309) and the rack (310) are meshed with each other.

4. The double-layer polyimide film production equipment for electronic flexible display substrate according to claim 1, characterized in that: The number of the support rings (311) is three groups, and the three groups of support rings (311) form a complete circular ring when fully closed.

5. The double-layer polyimide film production equipment for electronic flexible display substrate according to claim 1, characterized in that: A connecting ring (7) is provided on the side surface of a group of the supporting frames (2), and the connecting ring (7) is used to rotatably mount one end of the rotating shaft (302) on the supporting frame (2).

6. The double-layer polyimide film production equipment for electronic flexible display substrate according to claim 1, characterized in that: The winding mechanism (3) is symmetrically arranged at both ends of the rotating shaft (302).

7. The double-layer polyimide film production equipment for electronic flexible display substrate according to claim 1, characterized in that: The planet carrier (304) and the connecting frame (306) are symmetrically arranged on both sides of the gear ring (307), and the planet carrier (304) and the connecting frame (306) are both made of stainless steel.

8. A process for producing a double-layer polyimide film for an electronic flexible display substrate, characterized in that: The specific steps are as follows: Step 1: Select raw materials: select 40-50 parts by weight of hexafluorodianhydride, 30-40 parts by weight of hexafluorodiamine, 30-35 parts by weight of N-methylpyrrolidone, 4-7 parts by weight of nano-nitrogen silica, 3-6 parts by weight of nano-alumina, 4-8 parts by weight of nano-silicon oxide, and 4-6 parts by weight of nano-filler; Step 2: mixing hexafluorodianhydride and hexafluorodiamine with N-methylpyrrolidone to carry out condensation polymerization to obtain a polyamic acid solution; Step 3: adding nano-nitrogen silica, nano-aluminum oxide, nano-silicon oxide and nano-filler to the polyamic acid solution to obtain a polyamic acid mixed solution; Step 4: Casting the polyamic acid mixed solution into a film, or immersing it in an imidization reagent to perform a first imidization reaction; Step 5: biaxially stretching the obtained polyamic acid cast film or the product of the first imidization reaction to obtain a polyimide stretched film; Step 6: Under the condition of gradient temperature increase, the polyimide stretched film is subjected to a second imidization reaction to finally obtain a polyimide film; Step 7: stack the two layers of polyimide film together, and use the double-layer polyimide film production equipment for electronic flexible display substrates described in any one of claims 1 to 7 to evenly and tightly roll them up.

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