A stretching system for double-stretched polyimide film

Abstract

The present invention provides a stretching system for double-stretched polyimide film, comprising a workbench, and a winding roller, a first guide roller, a second guide roller and a stretching roller arranged on the workbench, wherein a film body is wound on the winding roller, and the free end of the film body is contacted and connected with the stretching roller after being guided by the first guide roller and the second guide roller. The present invention also comprises a thickness adjusting mechanism, wherein the thickness adjusting mechanism is arranged between the first guide roller and the second guide roller, and the thickness adjusting mechanism has a thickness adjusting cavity for the film body to pass through, so as to control the thickness of the film body through the thickness adjusting cavity. The present invention is provided with a thickness adjusting mechanism for adjusting the polyimide film, so that the thickness of the polyimide film remains consistent after passing through, thereby cooperating with the stretching process of the stretching roller, so that a polyimide film with consistent thickness can be obtained through the thickness adjusting mechanism and the stretching roller.

Description

Technical Field

[0001] The invention relates to the technical field of double-stretched polyimide films, in particular to a stretching system for double-stretched polyimide films. Background Art

[0002] Polyimide film is the best film-type insulating material in the world. It is made of pyromellitic anhydride and diaminodiphenyl ether in a strong polar solvent, polycondensed and cast into film, and then imidized. The production of polyimide film is basically a two-step process. The first step is to synthesize polyamic acid, and the second step is to form film imidization. The main film-forming methods are dipping, casting and drooling stretching. Preparation steps: The defoamed polyamic acid solution is pressed into the drooling nozzle storage tank on the front head to form a liquid film with uniform thickness, and then enters the drying channel for drying. Clean and dry air is sent to the heater by the blower to be preheated to a certain temperature and then enters the upper and lower drying channels. The polyamic acid film runs on the steel belt for one week, and the solvent evaporates to become a solid film. The film peeled off from the steel belt is heated by gradient and biaxially stretched, and then wound up by the winder.

[0003] Most of the existing stretching processes first preheat the polyimide film and clamp the edge of the film with a clamp, then start the controller to drive the clamp to move, so as to drive the edge of the film to be stretched laterally through the clamp. However, since the thickness and temperature of each part of the film are different, the deformation amount of the film at each part after being pulled is different, which in turn affects the uniformity of the film thickness and the quality of the produced polyimide film.

[0004] In view of this, in order to overcome the above technical problems, the present invention proposes a stretching system for a double-stretched polyimide film, which solves the above technical problems. Summary of the invention

[0005] To achieve the above-mentioned purpose, the present invention provides a stretching system for double-stretched polyimide film, comprising a workbench, and a winding roller, a first guide roller, a second guide roller and a stretching roller arranged on the workbench, a film body being wound on the winding roller, a free end of the film body being contacted and connected with the stretching roller after being guided by the first guide roller and the second guide roller, and also comprising a thickness adjusting mechanism, wherein the thickness adjusting mechanism is arranged between the first guide roller and the second guide roller, and the thickness adjusting mechanism has a thickness adjusting cavity for the film body to pass through, so as to control the thickness of the film body through the thickness adjusting cavity.

[0006] Optionally, the thickness adjusting mechanism also includes a first thickness adjusting roller and a second thickness adjusting roller, the thickness adjusting cavity is formed between the first thickness adjusting roller and the second thickness adjusting roller, the first thickness adjusting roller and the second thickness adjusting roller are respectively fixedly sleeved on the outside of the first rotating rod and the second rotating rod, the first rotating rod and the second rotating rod are respectively fixedly connected to the outer side walls of the first nut and the second nut, the first nut and the second nut are both threadedly sleeved on the outside of the threaded rod, one end of the threaded rod is fixedly connected to the driving end of the driving motor, the driving motor is fixedly set on the side wall of the moving hole, and the moving hole is opened on the workbench, wherein the first nut and the second nut are both movably set in the moving hole, and the thread directions of the first nut and the second nut are opposite.

[0007] Optionally, the thickness adjustment mechanism also includes a guide limit assembly with one end fixedly connected to the lower end surface of the first nut and the other end fixedly connected to the upper end surface of the second nut, the guide limit assembly including a guide limit rod, a guide limit cylinder and a guide limit spring, the guide limit rod is movably inserted in the guide limit cylinder, the guide limit spring is wound and arranged outside the guide limit rod, and the two ends of the guide limit spring are respectively fixedly connected to the side wall of the guide limit rod and the outer side wall of the guide limit cylinder.

[0008] Optionally, it also includes a first temperature adjustment mechanism, which includes two first temperature adjustment holes respectively opened in the first thickness adjustment roller and the second thickness adjustment roller, and a plurality of first temperature sensors respectively fixedly embedded outside the first thickness adjustment roller and the second thickness adjustment roller, and also includes a spiral heating wire fixedly set in the first temperature adjustment hole, and the spiral heating wire is set in contact with the hole wall of the first temperature adjustment hole.

[0009] Optionally, it also includes a second temperature control mechanism, the second temperature control mechanism includes second temperature control holes respectively opened in the first rotating rod and the second rotating rod, and a plurality of second temperature sensors embedded in the first temperature control hole and the side wall, the first rotating rod is provided with a plurality of connecting holes, the connecting holes are used for connecting the first temperature control hole and the second temperature control hole, the first rotating rod is provided with an air inlet hole connected to the second temperature control hole, the air inlet hole is blocked with a blocking cover, a blocking pad is fixedly provided on the side wall of the blocking cover, the blocking pad and the first rotating rod are mutually opposed, the side wall of the blocking cover is fixedly connected with an elastic telescopic component, the free end of the elastic telescopic component is fixedly connected to the side wall of the movable groove, the movable groove is opened on the first rotating rod, the elastic telescopic component includes an elastic telescopic rod, an elastic telescopic cylinder and an elastic telescopic spring, the elastic telescopic rod is movably inserted in the elastic telescopic cylinder, the elastic telescopic spring is wound outside the elastic telescopic rod, and the two ends of the elastic telescopic spring are respectively fixedly connected to the side wall of the elastic telescopic rod and the outer side wall of the elastic telescopic cylinder.

[0010] Optionally, the second temperature control mechanism also includes a driving component, which includes a moving rod fixedly connected to the side wall of the sealing cover, the free end of the moving rod is fixedly connected to a magnet block, an electromagnet matching the magnet block is arranged in the second temperature control hole, the electromagnet is fixedly set on the side wall of the fixing ring, the fixing ring is fixedly set on the side wall of the second temperature control hole, and the fixing ring is movably mounted outside the moving rod.

[0011] Optionally, it also includes a first molding mechanism arranged between the second guide roller and the thickness adjusting mechanism, the first molding mechanism includes a vertical molding plate assembly and a second molding plate assembly, a vertical molding cavity for the film body to pass through is formed between the vertical molding plate assembly and the second molding plate assembly, fixing rods are fixedly provided on the lower end surfaces of the vertical molding plate assembly and the second molding plate assembly, the two fixing rods are fixedly connected to the first nut and the second nut, respectively, and a first guide groove is opened on the lower ends of the vertical molding plate assembly and the second molding plate assembly.

[0012] Optionally, the vertical shaping plate assembly includes a first vertical shaping plate and a second vertical shaping plate, the first vertical shaping plate is provided with a connecting groove, the second vertical shaping plate is fixedly provided with a connecting plate, the connecting plate is movably inserted in the connecting groove, the first vertical shaping plate is fixedly provided with an electric telescopic rod, and the driving end of the electric telescopic rod is fixedly connected to the connecting plate.

[0013] Optionally, it also includes a third temperature control mechanism, which includes a first refrigerator fixedly connected to the side wall of the vertical shaping plate assembly, and the third temperature control mechanism also includes a heat conduction plate and a third temperature sensor, the heat conduction plate is fixedly inserted in the vertical shaping plate assembly, the third temperature sensor is embedded in the vertical shaping plate assembly, and the third temperature sensor is arranged toward the film body.

[0014] Optionally, it also includes a second shaping mechanism, which includes two transverse shaping plates, a transverse shaping cavity for the film body to pass through is formed between the two transverse shaping plates, the two transverse shaping plates are fixedly connected to the sides away from each other with cylinder arms, the free ends of the cylinder arms are fixedly connected to the driving ends of the driving cylinders, the driving cylinders are fixedly set on the side walls of the workbench, the two transverse shaping plates are each provided with a second refrigerator, and the two transverse shaping plates are each provided with a second guide groove.

[0015] The beneficial effects of the present invention are as follows:

[0016] The present invention improves the structure of an existing polyimide film stretching device. The improved polyimide film stretching device is provided with a stretching roller for stretching the polyimide film in a horizontal direction, and a thickness adjustment mechanism for adjusting the polyimide film is provided, so that the thickness of the polyimide film remains consistent after passing through, thereby cooperating with the stretching process of the stretching roller, so that a polyimide film with consistent thickness can be obtained through the thickness adjustment mechanism and the stretching roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of an embodiment of a stretching system for a double-stretched polyimide film of the present invention;

[0018] Figure 2 It is a cross-sectional structural diagram of a thickness adjustment mechanism in a stretching system of a double-stretched polyimide film of the present invention;

[0019] Figure 3 It is a cross-sectional structural diagram of the first temperature regulating mechanism in the stretching system of the double-stretched polyimide film of the present invention;

[0020] Figure 4 It is a cross-sectional structural diagram of the second temperature regulating mechanism in the stretching system of the double-stretched polyimide film of the present invention;

[0021] Figure 5 The stretching system of the double-stretched polyimide film of the present invention Figure 4 A schematic diagram of the enlarged structure in the middle;

[0022] Figure 6 It is a structural schematic diagram of the first shaping mechanism in the stretching system of the double-stretched polyimide film of the present invention;

[0023] Figure 7 The stretching system of the double-stretched polyimide film of the present invention Figure 6 Middle B is an enlarged schematic diagram of the structure;

[0024] Figure 8 It is a schematic structural diagram of the third temperature regulating mechanism in the stretching system of the double-stretched polyimide film of the present invention;

[0025] Fig. 9 It is a schematic diagram of a vertical shaping plate assembly in a stretching system for a double-stretched polyimide film of the present invention;

[0026] Fig.10 The stretching system of the double-stretched polyimide film of the present invention Fig. 9 A magnified schematic diagram of the C structure;

[0027] Fig.11 It is a structural schematic diagram of the second shaping mechanism in the stretching system of the double-stretched polyimide film of the present invention;

[0028] Fig.12It is a partial cross-sectional structural schematic diagram of the second shaping mechanism of the stretching system of the double-stretched polyimide film of the present invention;

[0029] Fig.13 The stretching system of the double-stretched polyimide film of the present invention Fig.12 A magnified schematic diagram of the D structure.

[0030] Reference numerals

[0031] Workbench 1, winding roller 2, film body 3, first guide roller 4, second guide roller 5,

[0032] Thickness adjustment mechanism 6, first thickness adjustment roller 61, first rotating rod 62, first nut 63, threaded rod 64, drive motor 65, second nut 66, second rotating rod 67, second thickness adjustment roller 68, guide limit assembly 69, guide limit rod 691, guide limit cylinder 692, guide limit spring 693, moving hole 610, thickness adjustment cavity 611,

[0033] Stretching roller 7,

[0034] The first temperature adjustment mechanism 8, the first temperature sensor 81, the first temperature adjustment hole 82, the spiral heating wire 83,

[0035] second temperature regulating mechanism 9, second temperature sensor 91, second temperature regulating hole 92, connecting hole 93, blocking cover 94, blocking pad 95, elastic telescopic component 96, elastic telescopic rod 961, elastic telescopic tube 962, elastic telescopic spring 963, moving groove 97, driving component 98, moving rod 981, magnet block 982, electromagnet 983, fixing ring 984,

[0036] The first shaping mechanism 10, the vertical shaping plate assembly 101, the first vertical shaping plate 1011, the second vertical shaping plate 1012, the connecting plate 1013, the connecting groove 1014, the electric telescopic rod 1015, the second shaping plate assembly 102, the vertical shaping cavity 103, the first guide groove 104, the fixing rod 105,

[0037] The third temperature adjustment mechanism 11, the first refrigerator 111, the heat conduction plate 112, the third temperature sensor 113,

[0038] The second shaping mechanism 12, the transverse shaping plate 121, the transverse shaping cavity 122, the cylinder arm 123, the driving cylinder 124, the second refrigerator 125, the second guide groove 126,

[0039] The scraping mechanism 13 , the scraping blade 131 , the suction hole 132 , the suction machine 133 , the mounting groove 134 , and the optical sensor 135 . DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field of the present invention. The words "including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0041] In view of the problems existing in the prior art, an embodiment of the present invention provides a stretching system for a double-stretched polyimide film, such as Figure 1 and Figure 2 As shown, it includes a workbench 1, and a winding roller 2, a first guide roller 4, a second guide roller 5 and a stretching roller 7 arranged on the workbench 1, a film body 3 is wound on the winding roller 2, and the free end of the film body 3 is contacted and connected with the stretching roller 7 after being guided by the first guide roller 4 and the second guide roller 5, and also includes a thickness adjusting mechanism 6, the thickness adjusting mechanism 6 is arranged between the first guide roller 4 and the second guide roller 5, and the thickness adjusting mechanism 6 has a thickness adjusting cavity 611 for the film body 3 to pass through, so as to control the thickness of the film body 3 through the thickness adjusting cavity 611.

[0042] During operation, since the thickness of the thickness-adjusting cavity 611 in the horizontal direction is consistent (which can be understood as the length in the horizontal direction), the polyimide film passing through the thickness-adjusting cavity 611 will be squeezed, so that the thickness of the polyimide film after passing through the thickness-adjusting cavity 611 is consistent with that of the thickness-adjusting cavity 611, thereby adjusting the thickness of the polyimide film. In this way, a stretched polyimide film with consistent thickness can be obtained through the stretching system of the double-pulled polyimide film in the present invention.

[0043] In order to make the thickness adjustment mechanism 6 applicable to the preparation of polyimide films of different thicknesses, in one embodiment, Figure 2As shown, the thickness adjusting mechanism 6 also includes a first thickness adjusting roller 61 and a second thickness adjusting roller 68, and the thickness adjusting cavity 611 is formed between the first thickness adjusting roller 61 and the second thickness adjusting roller 68. The first thickness adjusting roller 61 and the second thickness adjusting roller 68 are respectively fixedly sleeved on the outside of the first rotating rod 62 and the second rotating rod 67, and the first rotating rod 62 and the second rotating rod 67 are respectively fixedly connected to the outer side walls of the first nut 63 and the second nut 66, and the first nut 63 and the second nut 66 are both threadedly sleeved on the outside of the threaded rod 64, and one end of the threaded rod 64 is fixedly connected to the driving end of the driving motor 65, and the driving motor 65 is fixedly set on the side wall of the moving hole 610, and the moving hole 610 is opened on the workbench 1, wherein the first nut 63 and the second nut 66 are both movably set in the moving hole 610, and the thread directions of the first nut 63 and the second nut 66 are opposite.

[0044] In this embodiment, the setting of the thickness adjusting cavity 611 in the thickness adjusting mechanism 6 can adjust the thickness of the polyimide film, so that the thickness of the polyimide film passing through the thickness adjusting mechanism 6 is kept consistent; and the structural design of the thickness adjusting mechanism 6 in this embodiment is reasonable, and the size of the thickness adjusting cavity 611 can be adjusted, so that the thickness adjusting mechanism 6 can prepare polyimide films of different thicknesses, and can ensure that within a polyimide film of a single thickness size, the entire polyimide film can have a uniform thickness size.

[0045] Specifically, since the thread directions of the first nut 63 and the second nut 66 are opposite, as the threaded rod 64 is rotated by the driving motor 65, the first nut 63 and the second nut 66 will synchronously move toward or away from each other, thereby driving the first thickness adjusting roller 61 and the second thickness adjusting roller 68 to move toward or away from each other through the first nut 63 and the second nut 66. When the first thickness adjusting roller 61 and the second thickness adjusting roller 68 move toward each other, the size of the thickness adjusting cavity 611 decreases. Through this example, a polyimide film with a smaller thickness can be prepared; when the first thickness adjusting roller 61 and the second thickness adjusting roller 68 move away from each other, the size of the thickness adjusting cavity 611 increases. Through this example, a polyimide film with a larger thickness can be prepared.

[0046] In order to limit the first nut 63 and the second nut 66, as shown in FIG. Figure 2As shown, the first nut 63 and the second nut 66 can only move in the horizontal direction. In one embodiment, the thickness adjustment mechanism 6 also includes a guide limit assembly 69 with one end fixedly connected to the lower end surface of the first nut 63 and the other end fixedly connected to the upper end surface of the second nut 66. The guide limit assembly 69 includes a guide limit rod 691, a guide limit cylinder 692 and a guide limit spring 693. The guide limit rod 691 is movably inserted in the guide limit cylinder 692, and the guide limit spring 693 is wound around the outside of the guide limit rod 691, and the two ends of the guide limit spring 693 are respectively fixedly connected to the side wall of the guide limit rod 691 and the outer side wall of the guide limit cylinder 692.

[0047] The setting of the guide limit assembly 69 in this embodiment can not only play a limiting role so that the first nut 63 and the second nut 66 only move in the horizontal direction, but also provide power for the reset movement of the first nut 63 and the second nut 66.

[0048] Since the stretching system of the double-stretched polyimide film is exposed to the air, the temperature of the film body 3 will decrease as it moves, and the degree of temperature reduction in different parts is also inconsistent, which makes the deformation of the polyimide film inconsistent when compressed, which is not conducive to the stretching of the polyimide film, and the thickness of the polyimide film obtained is inconsistent.

[0049] In order to solve the above problems, in one implementation, Figure 3 As shown, the stretching system of the double-stretched polyimide film also includes a first temperature control mechanism 8, which includes two first temperature control holes 82 respectively opened in the first thickness adjusting roller 61 and the second thickness adjusting roller 68, and a plurality of first temperature sensors 81 respectively fixedly embedded outside the first thickness adjusting roller 61 and the second thickness adjusting roller 68, and also includes a spiral heating wire 83 fixedly set in the first temperature control hole 82, and the spiral heating wire 83 is set in contact with the hole wall of the first temperature control hole 82.

[0050] In this embodiment, the first temperature adjustment mechanism 8 is set to adjust the temperature of the first thickness adjustment roller 61 and the second thickness adjustment roller 68, so that the temperature on the first thickness adjustment roller 61 and the second thickness adjustment roller 68 is consistent, so as to ensure that the polyimide film can always be heated by the thickness adjustment mechanism 6, so that the polyimide film has a constant temperature, so that the polyimide film passing through has the same deformation, and then through the extrusion of the thickness adjustment mechanism 6, a polyimide film with consistent thickness can be obtained. Specifically, the first temperature sensor 81 senses the temperature on the first thickness adjustment roller 61 and the second thickness adjustment roller 68 in real time, and at the same time, it can also sense the temperature of the first thickness adjustment roller 61 and the second thickness adjustment roller 68 in real time, so that it can ensure that the first thickness adjustment roller 61 and the second thickness adjustment roller 68 have a constant temperature, and at the same time, it can ensure that the first thickness adjustment roller 61 and the second thickness adjustment roller 68 have the same temperature as the polyimide film.

[0051] The first temperature sensor 81 detects the temperature of the first thickness adjusting roller 61, the second thickness adjusting roller 68 and the polyimide film in real time. By controlling the temperature of the first thickness adjusting roller 61 and the second thickness adjusting roller 68 to be the first preset temperature, the temperature of the polyimide film passing through the thickness adjusting mechanism 6 can be controlled to be the first preset temperature.

[0052] When the first temperature control mechanism 8 heats the first thickness adjustment roller 61 and the second thickness adjustment roller 68, due to the different seasonal ambient temperatures, the temperature on the first thickness adjustment roller 61 and the second thickness adjustment roller 68 may be higher than the first preset temperature in different seasons. In this case, the temperature on the first thickness adjustment roller 61 and the second thickness adjustment roller 68 cannot be kept constant.

[0053] In order to solve the above problems, in one implementation, Figure 4 and Figure 5As shown, the stretching system of the double-stretched polyimide film also includes a second temperature control mechanism 9, which includes second temperature control holes 92 respectively opened in the first rotating rod 62 and the second rotating rod 67, and a plurality of second temperature sensors 91 embedded in the first temperature control hole 82 and the side wall. The first rotating rod 62 is provided with a plurality of connecting holes 93, and the connecting holes 93 are used for connecting the first temperature control hole 82 and the second temperature control hole 92. The first rotating rod 62 is provided with an air inlet hole connected to the second temperature control hole 92, and a blocking cover 94 is provided on the air inlet hole, and a blocking pad 95 is fixedly provided on the side wall of the blocking cover 94. 95 is arranged to be in conflict with the first rotating rod 62, the side wall of the blocking cover 94 is fixedly connected with an elastic telescopic component 96, the free end of the elastic telescopic component 96 is fixedly connected to the side wall of the movable groove 97, and the movable groove 97 is arranged on the first rotating rod 62, the elastic telescopic component 96 includes an elastic telescopic rod 961, an elastic telescopic tube 962 and an elastic telescopic spring 963, the elastic telescopic rod 961 is movably inserted in the elastic telescopic tube 962, the elastic telescopic spring 963 is wound outside the elastic telescopic rod 961, and the two ends of the elastic telescopic spring 963 are respectively fixedly connected to the side wall of the elastic telescopic rod 961 and the outer side wall of the elastic telescopic tube 962.

[0054] The second temperature control mechanism 9 in this embodiment can realize cooling of the first thickness adjustment roller 61 and the second thickness adjustment roller 68 , and realize constant temperature control of the first thickness adjustment roller 61 and the second thickness adjustment roller 68 by cooperating with the first temperature control mechanism 8 .

[0055] In one embodiment, the second temperature control mechanism 9 also includes a driving component 98, and the driving component 98 includes a moving rod 981 fixedly connected to the side wall of the sealing cover 94, and the free end of the moving rod 981 is fixedly connected to a magnet block 982. An electromagnet 983 matching the magnet block 982 is arranged in the second temperature control hole 92, and the electromagnet 983 is fixedly set on the side wall of the fixing ring 984. The fixing ring 984 is fixedly set on the side wall of the second temperature control hole 92, and the fixing ring 984 is movably sleeved outside the moving rod 981.

[0056] Specifically, the second temperature sensor 91 is used in conjunction with the first temperature sensor 81. When the second temperature sensor 91 senses the temperature on the first thickness adjustment roller 61 and the second thickness adjustment roller 68, which is higher than the first preset temperature, the signal is transmitted to the central processor, and the central processor controls the electromagnet 983 to start powering on and generate magnetism. Under the action of the magnetic force, the electromagnet 983 pulls the magnet block 982 to move to the left. The leftward movement of the magnet block 982 will move the blocking cover 94 to the left through the moving rod 981, thereby making the outer The cold air enters into the second temperature adjustment hole 92 and the first temperature adjustment hole 82, thereby cooling the first thickness adjustment roller 61 and the second thickness adjustment roller 68 from the inside, and the second temperature sensor 91 senses the temperature changes in the first thickness adjustment roller 61 and the second thickness adjustment roller 68 in real time. When the temperature of the first thickness adjustment roller 61 and the second thickness adjustment roller 68 reaches the first preset temperature, the central processing unit controls the electromagnet 983 to cut off the power, thereby achieving the constant temperature of the first thickness adjustment roller 61 and the second thickness adjustment roller 68 through the cooperation of the first temperature adjustment mechanism 8 and the second temperature adjustment mechanism 9.

[0057] In order to keep the thickness of the polyimide film passing through the thickness adjustment mechanism 6 constant, in one embodiment, Figure 6 and Figure 7 As shown, the stretching system of the double-stretched polyimide film also includes a first molding mechanism 10 arranged between the second guide roller 5 and the thickness adjustment mechanism 6, and the first molding mechanism 10 includes a vertical molding plate assembly 101 and a second molding plate assembly 102, and a vertical molding cavity 103 for the film body 3 to pass through is formed between the vertical molding plate assembly 101 and the second molding plate assembly 102, and fixing rods 105 are fixedly provided on the lower end surfaces of the vertical molding plate assembly 101 and the second molding plate assembly 102, and the two fixing rods 105 are fixedly connected to the first nut 63 and the second nut 66 respectively, and the lower ends of the vertical molding plate assembly 101 and the second molding plate assembly 102 are provided with first guide grooves 104.

[0058] The setting of the first shaping mechanism 10 in this embodiment can make the polyimide film reach a second preset temperature by cooling. At the second preset temperature, the polyimide film will not change in thickness, but will not undergo rigid fracture when passing through the second guide roller 5.

[0059] It is worth noting that the vertical molding plate assembly 101 and the second molding plate assembly 102 in this embodiment are adjustable so as to change the size of the vertical molding cavity 103, and the adjustment process of the vertical molding plate assembly 101 and the second molding plate assembly 102 can be consistent with the adjustment of the first nut 63 and the second nut 66, that is, it can be understood that the size of the vertical molding cavity 103 is always consistent with the size of the thickness adjustment cavity 611.

[0060] In one embodiment, if Figure 8 As shown, the stretching system of the double-stretched polyimide film also includes a third temperature control mechanism 11, and the third temperature control mechanism 11 includes a first refrigerator 111 fixedly connected to the side wall of the vertical shaping plate assembly 101, and the third temperature control mechanism 11 also includes a heat conduction plate 112 and a third temperature sensor 113, the heat conduction plate 112 is fixedly inserted in the vertical shaping plate assembly 101, and the third temperature sensor 113 is embedded in the vertical shaping plate assembly 101, and the third temperature sensor 113 is arranged toward the film body 3.

[0061] The setting of the third temperature control mechanism 11 in this embodiment can cool down the polyimide film so that the polyimide film reaches the second preset temperature, thereby preventing the thickness of the polyimide film from changing again. Specifically, the third temperature sensor 113 monitors the temperature on the polyimide film in real time. When it senses that the temperature on the polyimide film is higher than the second preset temperature, the central processing unit controls the first refrigerator 111 to work, and reduces the temperature on the vertical shaping plate assembly 101 through the heat conduction plate 112, thereby lowering the temperature of the polyimide film. When the third temperature control mechanism 11 detects that the temperature of the polyimide film reaches the second preset temperature, the first refrigerator 111 is controlled to stop working.

[0062] As the stretching system continues to work, the size of the vertical shaping cavity 103 and the size of the thickness adjustment cavity 611 will change, resulting in inconsistency between the size of the vertical shaping cavity 103 and the size of the thickness adjustment cavity 611. In order to solve the above problem, in one embodiment, as Fig. 9 and Fig.10 As shown, the vertical shaping plate assembly 101 includes a first vertical shaping plate 1011 and a second vertical shaping plate 1012, the first vertical shaping plate 1011 is provided with a connecting groove 1014, the second vertical shaping plate 1012 is fixedly provided with a connecting plate 1013, the connecting plate 1013 is movably plugged into the connecting groove 1014, the first vertical shaping plate 1011 is fixedly provided with an electric telescopic rod 1015, and the driving end of the electric telescopic rod 1015 is fixedly connected to the connecting plate 1013.

[0063] When the external monitoring equipment (an optical detector may be used) detects that the size of the vertical shaping cavity 103 is inconsistent with the size of the thickness adjustment cavity 611, the electric telescopic rod 1015 will be started, and the electric telescopic rod 1015 will move with the second vertical shaping plate 1012 through the connecting plate 1013, thereby changing the size of the vertical shaping cavity 103 to ensure that the size of the vertical shaping cavity 103 is larger than the size of the thickness adjustment cavity 611 and is always consistent.

[0064] In order to make the polyimide film finally shaped after passing through the second guide roller 5, that is, to reach the third preset temperature, in one embodiment, as Fig.11 As shown, the stretching system of the double-stretched polyimide film also includes a second molding mechanism 12, which includes two transverse molding plates 121, and a transverse molding cavity 122 for the film body 3 to pass through is formed between the two transverse molding plates 121, and the two transverse molding plates 121 are fixedly connected to the sides away from each other with cylinder arms 123, and the free ends of the cylinder arms 123 are fixedly connected to the driving ends of the driving cylinders 124, and the driving cylinders 124 are fixedly set on the side walls of the workbench 1, and the two transverse molding plates 121 are both provided with second refrigerators 125, and the two transverse molding plates 121 are both provided with second guide grooves 126.

[0065] The second shaping mechanism 12 in this embodiment can cool down the polyimide film passing through the transverse shaping cavity 122 again, so that the temperature of the polyimide film passing through reaches a third preset temperature, at which the thickness of the polyimide film no longer changes and reaches the final practical hardness. It is worth noting that the structural design of the second shaping mechanism 12 is reasonable and can also achieve an adjustment function, that is, change the size of the transverse shaping cavity 122 in the vertical direction, so that the second shaping mechanism 12 can be suitable for polyimide films of different thicknesses.

[0066] During the stretching process of the polyimide film, burrs or solidified particles will be formed on the surface of the molded part. The presence of burrs or particles will reduce the quality of the polyimide film.

[0067] In order to solve the above problems, the present invention, in one embodiment, Fig.12 and Fig.13 As shown, the stretching system of the double-stretched polyimide film includes a scraping mechanism 13, which includes a suction hole 132 opened at the bottom end of the second guide groove 126, and a scraping knife 131 fixedly arranged in the suction hole 132, and the lower end of the scraping knife 131 is on the same horizontal line as the lower end of the transverse shaping plate 121. The scraping mechanism 13 also includes a suction machine 133, and the suction machine 133 is fixedly installed in a mounting groove 134, and the mounting groove 134 is opened on the transverse shaping plate 121. The suction pipe of the suction machine 133 is fixedly arranged in the suction hole 132, and the air outlet pipe of the suction machine 133 is fixed on the side wall of the mounting groove 134. The lower end of the scraping knife 131 is fixedly connected with an optical sensor 135.

[0068] The scraping mechanism 13 can effectively scrape off burrs or solidified particles on the surface of the polyimide film, so that a high-quality polyimide film can be obtained in one go. At the same time, there is no need to add subsequent settings for removing burrs or solidified particles. This can not only reduce production costs, but also improve work efficiency.

[0069] During operation, as the polyimide film is guided into the transverse molding cavity 122 by the second guide groove 126, the scraper 131 can remove the burrs or solidified particles on the polyimide film. The removed burrs or solidified particles will enter the suction hole 132 due to inertia. As the polyimide film continues to move, the optical sensor 135 will detect the entry signal of the polyimide film and transmit the signal to the central processing unit. The central processing unit controls the drive of the suction machine 133 to extract the burrs or solidified particles in the suction hole 132, thereby avoiding the accumulation of burrs or solidified particles in the suction hole 132.

[0070] It should be understood that, in this embodiment, the first preset temperature, the second preset temperature and the third preset temperature gradually decrease from left to right.

[0071] Although the embodiments of the present invention are described in detail above, it is obvious to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention as described in the claims. Moreover, the present invention described herein may have other embodiments and may be implemented or realized in a variety of ways.

Claims

1. A stretching system for a double-stretched polyimide film, characterized in that: The invention comprises a workbench (1), and a winding roller (2), a first guide roller (4), a second guide roller (5) and a stretching roller (7) arranged on the workbench (1), wherein a film body (3) is wound around the winding roller (2), and a free end of the film body (3) is contacted and connected with the stretching roller (7) after being guided by the first guide roller (4) and the second guide roller (5), and further comprises a thickness adjustment mechanism (6), wherein the thickness adjustment mechanism (6) is arranged between the first guide roller (4) and the second guide roller (5), and the thickness adjustment mechanism (6) has a thickness adjustment cavity (611) for the film body (3) to pass through, so as to control the thickness of the film body (3) through the thickness adjustment cavity (611); The thickness adjustment mechanism (6) further comprises a first thickness adjustment roller (61) and a second thickness adjustment roller (68); the thickness adjustment cavity (611) is formed between the first thickness adjustment roller (61) and the second thickness adjustment roller (68); the first thickness adjustment roller (61) and the second thickness adjustment roller (68) are respectively fixedly sleeved outside the first rotating rod (62) and the second rotating rod (67); the first rotating rod (62) and the second rotating rod (67) are respectively fixedly connected to the outer side walls of the first nut (63) and the second nut (66); the first nut The first nut (63) and the second nut (66) are both threadedly sleeved on the outside of the threaded rod (64), one end of the threaded rod (64) is fixedly connected to the driving end of the driving motor (65), the driving motor (65) is fixedly arranged on the side wall of the moving hole (610), and the moving hole (610) is opened on the workbench (1), wherein the first nut (63) and the second nut (66) are both movably arranged in the moving hole (610), and the thread directions of the first nut (63) and the second nut (66) are opposite; The device further comprises a first temperature adjustment mechanism (8), wherein the first temperature adjustment mechanism (8) comprises two first temperature adjustment holes (82) respectively opened in the first thickness adjustment roller (61) and the second thickness adjustment roller (68), and a plurality of first temperature sensors (81) respectively fixedly embedded outside the first thickness adjustment roller (61) and the second thickness adjustment roller (68), and further comprises a spiral heating wire (83) fixedly arranged in the first temperature adjustment hole (82), wherein the spiral heating wire (83) is arranged in contact with the hole wall of the first temperature adjustment hole (82); The invention also comprises a second temperature adjustment mechanism (9), the second temperature adjustment mechanism (9) comprising second temperature adjustment holes (92) respectively provided in the first rotating rod (62) and the second rotating rod (67), and a plurality of second temperature sensors (91) embedded in the first temperature adjustment hole (82) and the side wall thereof, the first rotating rod (62) being provided with a plurality of communication holes (93), the communication holes (93) being used for communication between the first temperature adjustment hole (82) and the second temperature adjustment hole (92), the first rotating rod (62) being provided with an air inlet hole communicating with the second temperature adjustment hole (92), the air inlet hole being sealed with a sealing cover (94), a sealing pad (95) being fixedly provided on the side wall of the sealing cover (94), the sealing pad (95) being connected to the first rotating rod ( 62) are arranged to conflict with each other, the side wall of the blocking cover (94) is fixedly connected to an elastic telescopic component (96), the free end of the elastic telescopic component (96) is fixedly connected to the side wall of the movable groove (97), the movable groove (97) is opened on the first rotating rod (62), the elastic telescopic component (96) includes an elastic telescopic rod (961), an elastic telescopic tube (962) and an elastic telescopic spring (963), the elastic telescopic rod (961) is movably inserted in the elastic telescopic tube (962), the elastic telescopic spring (963) is wound and arranged outside the elastic telescopic rod (961), and the two ends of the elastic telescopic spring (963) are respectively fixedly connected to the side wall of the elastic telescopic rod (961) and the outer side wall of the elastic telescopic tube (962).

2. The stretching system for double-stretched polyimide film according to claim 1, characterized in that: The thickness adjustment mechanism (6) further comprises a guide limit assembly (69) having one end fixedly connected to the lower end surface of the first nut (63) and the other end fixedly connected to the upper end surface of the second nut (66); the guide limit assembly (69) comprises a guide limit rod (691), a guide limit cylinder (692) and a guide limit spring (693); the guide limit rod (691) is movably inserted in the guide limit cylinder (692); the guide limit spring (693) is wound around the outside of the guide limit rod (691); and the two ends of the guide limit spring (693) are respectively fixedly connected to the side wall of the guide limit rod (691) and the outer side wall of the guide limit cylinder (692).

3. The stretching system for double-stretched polyimide film according to claim 1, characterized in that: The second temperature adjustment mechanism (9) further comprises a driving assembly (98), the driving assembly (98) comprising a moving rod (981) fixedly connected to the side wall of the blocking cover (94), the free end of the moving rod (981) being fixedly connected to a magnet block (982), an electromagnet (983) matching the magnet block (982) being arranged in the second temperature adjustment hole (92), the electromagnet (983) being fixedly arranged on the side wall of a fixing ring (984), the fixing ring (984) being fixedly arranged on the side wall of the second temperature adjustment hole (92), and the fixing ring (984) being movably sleeved outside the moving rod (981).

4. The stretching system for double-stretched polyimide film according to claim 1, characterized in that: The invention also comprises a first shaping mechanism (10) arranged between the second guide roller (5) and the thickness adjustment mechanism (6), wherein the first shaping mechanism (10) comprises a vertical shaping plate assembly (101) and a second shaping plate assembly (102), wherein a vertical shaping cavity (103) for the film body (3) to pass through is formed between the vertical shaping plate assembly (101) and the second shaping plate assembly (102), and fixing rods (105) are fixedly arranged on the lower end surfaces of the vertical shaping plate assembly (101) and the second shaping plate assembly (102), and the two fixing rods (105) are respectively fixedly connected to the first nut (63) and the second nut (66), and the lower ends of the vertical shaping plate assembly (101) and the second shaping plate assembly (102) are provided with first guide grooves (104).

5. The stretching system for double-stretched polyimide film according to claim 4, characterized in that: The vertical shaping plate assembly (101) comprises a first vertical shaping plate (1011) and a second vertical shaping plate (1012); a connecting groove (1014) is provided on the first vertical shaping plate (1011); a connecting plate (1013) is fixedly provided on the second vertical shaping plate (1012); the connecting plate (1013) is movably plugged into the connecting groove (1014); an electric telescopic rod (1015) is fixedly provided on the first vertical shaping plate (1011); a driving end of the electric telescopic rod (1015) is fixedly connected to the connecting plate (1013).

6. The stretching system for double-stretched polyimide film according to claim 5, characterized in that: The invention also comprises a third temperature adjustment mechanism (11), the third temperature adjustment mechanism (11) comprising a first refrigerator (111) fixedly connected to the side wall of the vertical shaping plate assembly (101), the third temperature adjustment mechanism (11) further comprising a heat conduction plate (112) and a third temperature sensor (113), the heat conduction plate (112) being fixedly plugged into the vertical shaping plate assembly (101), the third temperature sensor (113) being embedded in the vertical shaping plate assembly (101), and the third temperature sensor (113) being arranged towards the film body (3).

7. The stretching system for double-stretched polyimide film according to claim 1, characterized in that: The invention also comprises a second shaping mechanism (12), wherein the second shaping mechanism (12) comprises two transverse shaping plates (121), wherein a transverse shaping cavity (122) for the film body (3) to pass through is formed between the two transverse shaping plates (121), and the two transverse shaping plates (121) are fixedly connected to a cylinder arm (123) on one side away from each other, and the free end of the cylinder arm (123) is fixedly connected to the driving end of a driving cylinder (124), and the driving cylinder (124) is fixedly arranged on the side wall of the workbench (1), and the two transverse shaping plates (121) are both provided with a second refrigerator (125), and the two transverse shaping plates (121) are both provided with a second guide groove (126).

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