A forming device and method for double-stretched polyimide film

Abstract

The present invention provides a forming device and method for a double-drawn polyimide film, comprising an extrusion head body, and an arc tube connected and fixedly arranged on the lower end of the extrusion head body, wherein a first vertical baffle and a second vertical baffle are fixedly arranged on two opposite inner walls in a first direction of the arc tube, respectively, and a first arc plate and a second arc plate are slidably arranged on two opposite inner walls in a second direction of the arc tube, respectively, the lower ends of the first arc plate, the second arc plate, the first vertical baffle and the second vertical baffle form an extrusion port for extruding a polyimide film, and the first arc plate and the second arc plate can slide upward or downward synchronously along the inner wall of the arc tube to adjust the size of the extrusion port; the arrangement of the present invention can produce polyimide films of different thicknesses through a single model of device, thereby effectively reducing production costs.

Description

Technical Field

[0001] The invention relates to the technical field of polyimide films, and in particular to a forming device and method for a double-drawn polyimide film. Background Art

[0002] Polyimide films include two types: homophenyl polyimide films and biphenyl polyimide films. They have excellent thermal stability, chemical corrosion resistance and mechanical properties. At the same time, their chemical properties are very stable and can prevent combustion without the addition of flame retardants. Therefore, they are used for motor slot insulation and cable wrapping materials. Transparent polyimide films can be used as soft solar cell base plates.

[0003] Polyimide film is often produced by the cast film method. The raw material is first plasticized and melted by an extruder, then extruded through a forming die, and cast in sheet form onto the roller surface of a steadily rotating cooling roller. The film is cooled and shaped on the cooling roller, and then the product is rolled up after traction and trimming.

[0004] However, the structure of the existing molding die extrusion port is single, and the diameter of the extrusion port cannot be adjusted, so the same type of molding die cannot produce polyimide films of different thicknesses. In order to solve the above problems, the present invention proposes a molding device and method for double-drawn polyimide films. Summary of the invention

[0005] To achieve the above-mentioned purpose, the present invention provides a forming device for a double-drawn polyimide film, comprising an extrusion head body, and an arc tube connected and fixedly arranged on the lower end of the extrusion head body, wherein a first vertical baffle and a second vertical baffle are fixedly arranged on two opposite inner walls in a first direction of the arc tube, respectively, and a first arc plate and a second arc plate are slidably arranged on two opposite inner walls in a second direction of the arc tube, respectively, the lower ends of the first arc plate, the second arc plate, the first vertical baffle and the second vertical baffle form an extrusion port for extruding a polyimide film, and the first arc plate and the second arc plate can slide upward or downward synchronously along the inner wall of the arc tube to adjust the size of the extrusion port.

[0006] Optionally, it also includes two guiding and blocking mechanisms respectively connected to the first arc plate and the second arc plate, the guiding and blocking mechanism including a connecting slider fixed to the side of the first arc plate away from the extrusion port, the connecting slider being movably arranged in the first through hole, the first through hole being opened on the arc tube, the end of the connecting slider away from the first arc plate being fixedly connected to the guiding slider, the guiding slider being slidably arranged in the arc guide groove, the arc guide groove being opened on the arc tube, and the arc guide groove being communicated with the first through hole, wherein the guiding slider and the side walls of the arc guide groove are arranged to conflict with each other, and the side walls of the first arc plate and the inner side walls of the arc tube are arranged to conflict with each other.

[0007] Optionally, the guiding and blocking mechanism further comprises a leakage-proof slide plate, which is fixedly arranged on the upper end of the first arc-shaped plate, and the leakage-proof slide plate is arranged to abut against the inner side wall of the arc-shaped tube, and the upper end of the leakage-proof slide plate is arranged as an arc-shaped structure.

[0008] Optionally, it also includes an oral adjustment mechanism, which has two second driving gears, and the second driving gears are fixedly sleeved outside the first rotating rod, the first rotating rod is rotatably inserted into the fixed cylinder, and the fixed cylinder is fixedly connected to the outer wall of the arc tube, and a section of the first rotating rod located inside the fixed cylinder is fixedly sleeved with a first driving gear, the first driving gear and the spur rack are meshed with each other, and the spur rack is slidably arranged in a second through hole, the second through hole is opened on the arc tube, and the second through hole and the arc guide groove are connected to each other, and one end of the spur rack located outside the second through hole is fixedly connected to the guide slide, and the oral adjustment mechanism also includes a power output mechanism, which is used to drive the two second driving gears to rotate counterclockwise and clockwise synchronously respectively.

[0009] Optionally, the power output mechanism includes two missing gears, which are respectively meshed with two second driving gears. The missing gears are fixedly sleeved outside the second rotating rod, and the second rotating rod is rotatably set on the outer wall of the arc tube. The side wall of the missing gear is fixedly connected with a connecting plate, and one end of a push-pull rod is hinged on the connecting plate. The other end of the push-pull rod is hinged on the lower end of the cylinder arm, and the upper end of the cylinder arm is fixedly connected to the driving end of the driving cylinder. The driving cylinder is fixedly set on the outer wall of the arc tube.

[0010] Optionally, it also includes a limit locking mechanism, which includes an arc-shaped support plate fixedly arranged on a side of the missing gear close to the arc-shaped tube, and a plurality of limit locking holes are opened on the arc-shaped support plate, in which a limit locking rod is movably inserted into one of the limit locking holes, and one end of the limit locking rod located outside the limit locking hole is fixedly connected to a magnet block, and a free surface of the magnet block is fixedly connected to a plurality of guide support assemblies, and the free end of the guide support assembly is fixedly connected to an electromagnet, and the electromagnet is fixedly arranged on the outer side wall of the arc-shaped tube;

[0011] Several of the limit locking holes are arranged on the same arc line, and there is a gap between two adjacent limit locking holes, the size of the gap is less than 0.5mm, and one end of the limit locking rod located in the limit locking hole is fixedly connected with a filling rod, the filling rod has a truncated cone structure, and the diameter of the end of the filling rod close to the limit locking rod is larger than the diameter of the end away from the limit locking rod.

[0012] Optionally, the guide support assembly includes a guide support rod, a guide support tube and a guide support spring, the guide support rod is movably inserted in the guide support tube, the guide support spring is wound and arranged outside the guide support rod, and the two ends of the guide support spring are respectively fixedly connected to the side wall of the guide support rod and the outer side wall of the guide support tube.

[0013] Optionally, the extrusion head body is connected to a liquid inlet pipe for the entry of liquid, and also includes a flow regulating mechanism, the flow regulating mechanism includes a fixed support cylinder fixedly inserted on the liquid inlet pipe and connected to the tube cavity of the liquid inlet pipe, a blocking slide is movably provided in the fixed support cylinder, and the up and down movement of the blocking slide can change the size of the tube cavity through which the liquid inlet pipe allows the liquid to pass, an L-shaped push-pull rod is fixedly connected to the lower end surface of the blocking slide, the L-shaped push-pull rod is movably inserted on the bottom plate of the fixed support cylinder, the free end of the L-shaped push-pull rod is fixedly connected to the side wall of the cylinder arm, and two sealing gaskets are provided on the outer movably sleeve of the L-shaped push-pull rod, and the two sealing gaskets are respectively fixedly connected to the upper end surface and the lower end surface of the bottom plate of the fixed support cylinder.

[0014] Optionally, it also includes a speed regulating mechanism, which includes a fixed box fixedly connected to the outer wall of the extrusion head body, the L-shaped push-pull rod movably inserted into the fixed box, and an outer fixed sleeve of the L-shaped push-pull rod located in the fixed box is provided with a fixed ring, a sliding piece is fixedly connected to the outer ring wall of the fixed ring, the sliding piece and the resistor body are slidably arranged with each other, and the resistor body is fixedly arranged on the inner wall of the fixed box, and a first terminal and a second terminal are fixedly connected to the resistor body and the sliding piece, respectively.

[0015] To achieve the above object, the present invention provides a method for forming a polyimide film using the double-drawn polyimide film forming device, and the method specifically comprises the following steps:

[0016] S1: Start the oral adjustment mechanism to drive the first arc plate and the second arc plate to move upward or downward synchronously to adjust the size of the extrusion port;

[0017] S2: The oral regulating mechanism drives the flow regulating mechanism to move while adjusting the size of the extrusion port, so as to adjust the size of the lumen of the liquid inlet tube through which the liquid can pass;

[0018] S3: The movement of the flow regulating mechanism will synchronously drive the speed regulating mechanism to move, so as to change the magnitude of the current flowing into the device;

[0019] S4: When the oral adjustment mechanism adjusts the size of the extrusion port to a preset value, the limit locking mechanism locks the missing gear, the first arc plate and the second arc plate, thereby locking the current size of the extrusion port.

[0020] The beneficial effects of the present invention are as follows:

[0021] The present invention improves the extrusion port structure of the existing polyimide film forming device. The improved extrusion port structure is surrounded by a first arc plate, a second arc plate, a first vertical baffle and a second vertical baffle, and the first arc plate and the second arc plate can slide upward or downward synchronously along the inner wall of the arc tube. By moving upward or downward, the size of the extrusion port can be changed, and polyimide films of different thicknesses can be extruded. In this way, the arrangement of the present invention can produce polyimide films of different thicknesses through a single model of device, thereby effectively reducing production costs; and when preparing polyimide films of different thicknesses, there is no need to stop the machine or transfer the machine, thereby greatly improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional structural diagram of an embodiment of a forming device for a double-stretched polyimide film of the present invention;

[0023] Figure 2 It is a rear structural schematic diagram of an embodiment of a forming device for a double-stretched polyimide film of the present invention;

[0024] Figure 3 The forming device of the double-drawn polyimide film of the present invention Figure 1 A schematic diagram of a partial cross-section structure viewed from above;

[0025] Figure 4 The forming device of the double-drawn polyimide film of the present invention Figure 1 A schematic diagram of the partially enlarged structure;

[0026] Figure 5 The forming device of the double-drawn polyimide film of the present invention Figure 4 A schematic diagram of the enlarged structure in the middle;

[0027] Figure 6 The forming device of the double-drawn polyimide film of the present invention Figure 2 A magnified schematic diagram of the structure B in the middle;

[0028] Figure 7 It is a structural schematic diagram of the limit locking mechanism in the double-drawn polyimide film forming device of the present invention;

[0029] Figure 8 The forming device of the double-drawn polyimide film of the present invention Figure 7 A partial enlarged schematic diagram;

[0030] Fig. 9 It is a structural schematic diagram of the flow rate regulating mechanism in the double-stretched polyimide film forming device of the present invention;

[0031] Fig.10 It is a structural schematic diagram of the speed regulating mechanism in the double-drawn polyimide film forming device of the present invention;

[0032] Fig.11 The forming device of the double-drawn polyimide film of the present invention Fig.10 Middle partial section view;

[0033] Fig.12 The present invention is a flow chart of the method for forming a double-stretched polyimide film.

[0034] Reference numerals

[0035] Extrusion head body 1, arc tube 2, first arc plate 3, second arc plate 4, extrusion port 5, first vertical baffle 6, second vertical baffle 7, guide blocking mechanism 8, connecting slider 81, first through hole 82, guide slide plate 83, arc guide groove 84, anti-leakage slide plate 85, oral adjustment mechanism 9, spur rack 91, second through hole 92, fixed cylinder 93, first drive gear 94, first rotating rod 95, second drive gear 96, power output mechanism 97, missing gear 971, second rotating rod 972, connecting plate 973, push-pull rod 974, cylinder arm 975, drive cylinder 976, limit lock Fixed mechanism 10, arc-shaped support plate 101, limit locking hole 102, limit locking rod 103, compensation rod 104, magnet block 105, guide support assembly 106, guide support rod 1061, guide support cylinder 1062, guide support spring 1063, electromagnet 107, liquid inlet pipe 11, flow regulating mechanism 12, L-shaped push-pull rod 121, fixed support cylinder 122, blocking slide plate 123, sealing gasket 124, speed regulating mechanism 13, fixed box 131, resistor 132, first terminal 133, slide 134, fixed ring 135, second terminal 136. DETAILED DESCRIPTION

[0036] 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 to which the present invention belongs. "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.

[0037] The size of the extrusion port of the existing double-stretch polyimide film forming equipment cannot be adjusted. Therefore, when polyimide films of different thicknesses need to be prepared, different types of equipment need to be replaced. In this way, in the daily production process, multiple types of equipment need to be used, which greatly increases the production investment. At the same time, when preparing polyimide films of different thicknesses, it is necessary to stop the equipment and switch it, which will reduce production efficiency.

[0038] In view of the problems existing in the prior art, an embodiment of the present invention provides a forming device for a double-stretched polyimide film, such as Figure 1 , Figure 2 and Figure 3As shown, the forming device of the double-drawn polyimide film includes an extrusion head body 1, and an arc tube 2 connected and fixed on the lower end of the extrusion head body 1, and the first vertical baffle 6 and the second vertical baffle 7 are fixedly arranged on the two opposite inner walls in the first direction of the arc tube 2, and the first arc plate 3 and the second arc plate 4 are slidably arranged on the two opposite inner walls in the second direction of the arc tube 2, and the lower ends of the first arc plate 3, the second arc plate 4, the first vertical baffle 6 and the second vertical baffle 7 form an extrusion port 5 for extruding polyimide film, and the first arc plate 3 and the second arc plate 4 can slide upward or downward synchronously along the inner wall of the arc tube 2 to adjust the size of the extrusion port 5.

[0039] exist Figure 1 In the example, the horizontal distance of the extrusion port 5 is L (the size of L is the thickness of the prepared double-stretched polyimide film). Since the first arc plate 3 and the second arc plate 4 are both arc structures, the size of L decreases step by step from top to bottom. Therefore, by adjusting the different positions of the first arc plate 3 and the second arc plate 4 at the lower tube mouth of the arc tube 2, the size of L can be adjusted, thereby adjusting the thickness of the polyimide film.

[0040] In a preferred example, the first curved plate 3 and the second curved plate 4 are symmetrically arranged about the vertical center line of the curved tube 2, and the connection structure of the first curved plate 3 and the second curved plate 4 is consistent, so in the subsequent description, only the first curved plate 3 is described as a representative. In this way, the adjustment of the first curved plate 3 and the second curved plate 4 can be achieved synchronously, so as to better control the adjustment of the size of the extrusion port 5. Specifically, when the first curved plate 3 and the second curved plate 4 move upward, the size of the extrusion port 5 will be reduced; when the first curved plate 3 and the second curved plate 4 move downward, the size of the extrusion port 5 will be increased.

[0041] In this embodiment, the first vertical baffle 6 and the second vertical baffle 7 play a blocking role.

[0042] It is worth noting that the first direction and the second direction are both on the same horizontal plane, and the first direction and the second direction are arranged perpendicular to each other. Figure 3 In the example, the first direction is the front-to-back direction, and the second direction is the left-to-right direction.

[0043] In order to make the first curved plate 3 and the second curved plate 4 always fit the inner wall of the curved tube 2 and ensure the sealing of the connection between the first curved plate 3 and the second curved plate 4 and the curved tube 2, in one embodiment, Figure 4As shown, the forming device of the double-drawn polyimide film also includes two guiding and blocking mechanisms 8 respectively connected to the first arc plate 3 and the second arc plate 4, the guiding and blocking mechanism 8 includes a connecting slider 81 fixed on the side of the first arc plate 3 away from the extrusion port 5, the connecting slider 81 is movably arranged in the first through hole 82, the first through hole 82 is opened on the arc tube 2, the end of the connecting slider 81 away from the first arc plate 3 is fixedly connected to the guiding slider 83, the guiding slider 83 is slidably arranged in the arc guide groove 84, the arc guide groove 84 is opened on the arc tube 2, and the arc guide groove 84 is connected to the first through hole 82, wherein the side walls of the guiding slider 83 and the arc guide groove 84 are mutually in conflict, and the side walls of the first arc plate 3 and the inner side walls of the arc tube 2 are mutually in conflict.

[0044] The setting of the guiding and blocking mechanism 8 in this embodiment can ensure that the first curved plate 3 and the second curved plate 4 are always in contact with the inner tube wall of the curved tube 2, so that when the first curved plate 3 and the second curved plate 4 move upward or downward, a smooth movement effect can be achieved, and it can be ensured that the change range of the extrusion port 5 is evenly distributed by the first curved plate 3 and the second curved plate 4; at the same time, the sealing performance of the connection between the first curved plate 3 and the second curved plate 4 and the curved tube 2 can be guaranteed to prevent the liquid from escaping from the connection.

[0045] In order to make the first curved plate 3, the second curved plate 4 and the curved tube 2 have better sealing performance, in one embodiment, as Figure 4 As shown, the guiding and sealing mechanism 8 also includes a leak-proof slide plate 85, which is fixedly arranged on the upper end of the first arc-shaped plate 3, and the leak-proof slide plate 85 is arranged to be in contact with the inner wall of the arc-shaped tube 2, and the upper end of the leak-proof slide plate 85 is arranged as an arc structure.

[0046] The provision of the anti-leakage slide plate 85 in this embodiment can assist in the blocking of the connection between the first curved plate 3 and the second curved plate 4 and the curved tube 2, and achieve a better sealing effect at the connection between the first curved plate 3 and the second curved plate 4 and the curved tube 2. In addition, the upper end of the anti-leakage slide plate 85 in this embodiment is provided as an arc structure, which can reduce resistance, and specifically, the first curved plate 3 and the second curved plate 4 will not be blocked by the liquid when moving upward.

[0047] In order to intelligently adjust the upward or downward movement of the first curved plate 3 and the second curved plate 4, in one embodiment, as Figure 5 and Figure 6As shown, the forming device of the double-drawn polyimide film also includes an oral adjustment mechanism 9, and the oral adjustment mechanism 9 has two second driving gears 96. The second driving gears 96 are fixedly sleeved outside the first rotating rod 95, and the first rotating rod 95 is rotatably inserted on the fixed cylinder 93, and the fixed cylinder 93 is fixedly connected to the outer wall of the arc tube 2. The first rotating rod 95 is located in a section of the fixed cylinder 93 and is fixedly sleeved with a first driving gear 94. The first driving gear 94 is meshed with the spur rack 91, and the spur rack 91 is slidably arranged in the second through hole 92, and the second through hole 92 is opened on the arc tube 2, and the second through hole 92 is connected to the arc guide groove 84. The end of the spur rack 91 outside the second through hole 92 is fixedly connected to the guide slide 83, and the oral adjustment mechanism 9 also includes a power output mechanism 97, which is used to drive the two second driving gears 96 to rotate counterclockwise and clockwise synchronously respectively.

[0048] The setting of the oral adjustment mechanism 9 in this embodiment can intelligently adjust the upward or downward movement of the first curved plate 3 and the second curved plate 4; and the structural design of the oral adjustment mechanism 9 is reasonable, and the upward or downward movement of the first curved plate 3 and the second curved plate 4 can be synchronously realized through the same driving source; specifically, the operation of the power output mechanism 97 in this embodiment can synchronously drive a second driving gear 96 to move clockwise and a second driving gear 96 to move counterclockwise, so that the upward or downward movement of the first curved plate 3 and the second curved plate 4 can be synchronously controlled through the combined structure of the first rotating rod 95, the first driving gear 94 and the spur rack 91.

[0049] In one embodiment, Figure 6 As shown, the power output mechanism 97 includes two missing gears 971, and the two missing gears 971 are respectively meshed with the two second driving gears 96. The missing gears 971 are fixedly sleeved outside the second rotating rod 972, and the second rotating rod 972 is rotatably set on the outer wall of the arc tube 2. The side wall of the missing gear 971 is fixedly connected with a connecting plate 973, and one end of a push-pull rod 974 is hinged on the connecting plate 973. The other end of the push-pull rod 974 is hinged on the lower end of a cylinder arm 975. The upper end of the cylinder arm 975 is fixedly connected to the driving end of a driving cylinder 976, and the driving cylinder 976 is fixedly set on the outer wall of the arc tube 2.

[0050] The setting of the power output mechanism 97 in this embodiment can synchronously drive a second drive gear 96 to move clockwise and a second drive gear 96 to move counterclockwise; when working, the start of the driving cylinder 976 will control the cylinder arm 975 to move downward, and the downward movement of the cylinder arm 975 will push a missing gear 971 to rotate clockwise and a missing gear 971 to rotate counterclockwise through the push-pull rod 974 and the connecting plate 973. Through the two missing gears 971, a second drive gear 96 can be synchronously controlled to move clockwise and a second drive gear 96 can be synchronously controlled to move counterclockwise.

[0051] Of course, in other examples, the driving of the two second driving gears 96 is not limited to the power output mechanism 97, for example, it can also be set as two motors with different rotation directions.

[0052] In order to make the size of the adjusted extrusion port 5 stable and not change when the polyimide film is extruded, in one embodiment, Figure 7 and Figure 8 As shown, the forming device of the double-drawn polyimide film also includes a limit locking mechanism 10, and the limit locking mechanism 10 includes an arc support plate 101 fixedly arranged on one side of the arc tube 2 near the missing gear 971, and a plurality of limit locking holes 102 are opened on the arc support plate 101, and a limit locking rod 103 is movably inserted in one of the limit locking holes 102, and the end of the limit locking rod 103 located outside the limit locking hole 102 is fixedly connected to a magnet block 105, and the free surface of the magnet block 105 is fixedly connected to a plurality of guide support assemblies 106, and the free end of the guide support assembly 106 is fixedly connected to the electromagnet 107, and the electromagnet 107 is fixedly arranged on the outer wall of the arc tube 2.

[0053] The setting of the limit locking mechanism 10 in this embodiment can directly lock the missing gear 971, thereby indirectly locking the size of the extrusion port 5. During operation, when the driving cylinder 976 is powered on and started, the electromagnet 107 is also powered on and started, and the power-on of the electromagnet 107 generates magnetism. Under the action of the magnetic force, the limit locking rod 103 is moved to the outside of the limit locking hole 102 through the magnet block 105, and the missing gear 971 can rotate normally. After the size of the extrusion port 5 is adjusted, the driving cylinder 976 and the electromagnet 107 are powered off synchronously. At this time, the electromagnet 107 loses its magnetism, and under the push of the guide support assembly 106, it will carry the limit locking rod 103 to perform a reset movement through the magnet block 105 and enter another limit locking hole 102, thereby locking the missing gear 971, and then locking it through the second driving gear 96, the first driving gear 94, the spur rack 91, the guide slide 83, the connecting slide 81 and the first arc plate 3, so that the size of the extrusion port 5 can be locked.

[0054] When the limit locking rod 103 performs the reset movement, in order to enable the limit locking rod 103 to accurately enter the limit locking hole 102, and to form an effective interference locking effect when entering the limit locking hole 102, in one embodiment, as Figure 8 As shown, several of the limit locking holes 102 are arranged on the same arc line, and there is a gap between two adjacent limit locking holes 102, and the size of the gap is less than 0.5mm. This arrangement can ensure that the distance between two adjacent limit locking holes 102 can be ignored, so that the limit locking rod 103 can enter the limit locking hole 102 more accurately; one end of the limit locking rod 103 located in the limit locking hole 102 is fixedly connected with a supplementary rod 104, and the supplementary rod 104 is a truncated cone structure, and the diameter of the end of the supplementary rod 104 close to the limit locking rod 103 is larger than the diameter of the end away from the limit locking rod 103. The arrangement of the supplementary rod 104, even if the central axis of the limit locking rod 103 does not coincide with the central axis of the limit locking hole 102, can also be supplemented by the supplementary rod 104 to achieve effective interference between the limit locking rod 103 and the side wall of the limit locking hole 102.

[0055] In one embodiment, Figure 8 As shown, the guide support assembly 106 includes a guide support rod 1061, a guide support tube 1062 and a guide support spring 1063. The guide support rod 1061 is movably inserted in the guide support tube 1062, and the guide support spring 1063 is wound around the outside of the guide support rod 1061. The two ends of the guide support spring 1063 are respectively fixedly connected to the side wall of the guide support rod 1061 and the outer side wall of the guide support tube 1062.

[0056] In order to make the amount of liquid entering the feed consistent with the size of the extrusion port 5, that is, to ensure that when the size of the extrusion port 5 becomes larger, the amount of liquid entering the feed will increase, and when the size of the extrusion port 5 becomes smaller, the amount of liquid entering the feed will decrease; in one embodiment, as Fig. 9As shown, the extrusion head body 1 is connected to a liquid inlet pipe 11 for liquid to enter, and the double-stretched polyimide film forming device also includes a flow regulating mechanism 12, which includes a fixed support cylinder 122 fixedly plugged on the liquid inlet pipe 11 and connected to the lumen of the liquid inlet pipe 11, and a blocking slide 123 is movably provided in the fixed support cylinder 122, and the up and down movement of the blocking slide 123 can change the flow of the liquid inlet pipe 11. The size of the tube cavity that allows the liquid to pass through, an L-shaped push-pull rod 121 is fixedly connected to the lower end face of the blocking slide plate 123, and the L-shaped push-pull rod 121 is movably inserted into the bottom plate of the fixed support tube 122, and the free end of the L-shaped push-pull rod 121 is fixedly connected to the side wall of the cylinder arm 975, and two sealing gaskets 124 are movably sleeved outside the L-shaped push-pull rod 121, and the two sealing gaskets 124 are respectively fixedly connected to the upper end face and the lower end face of the bottom plate of the fixed support tube 122.

[0057] The setting of the flow regulating mechanism 12 in this embodiment can ensure that the amount of liquid entering is consistent with the size adjustment of the extrusion port 5, that is, when the size of the extrusion port 5 becomes larger, the amount of liquid entering will increase, and when the size of the extrusion port 5 becomes smaller, the amount of liquid entering will decrease.

[0058] Specifically, when the cylinder arm 975 in the present invention moves downward, it will drive the second drive gear 96 on the left to rotate counterclockwise, and the second drive gear 96 on the right to rotate clockwise. In this way, through the combined structure of the first rotating rod 95, the first drive gear 94, the spur rack 91, the guide slide 83 and the connecting slide 81, the first curved plate 3 and the second curved plate 4 are moved upward synchronously, thereby increasing the size of the extrusion port 5. At the same time, the downward movement of the cylinder arm 975 will pull the blocking slide 123 downward through the L-shaped push-pull rod 121. The downward movement of the blocking slide 123 will increase the amount of liquid entering the tube 11 for conveying the liquid, thereby increasing the input amount of the liquid. This can effectively prevent insufficient liquid in the extrusion head body 1, thereby ensuring that there is sufficient pressure to extrude a polyimide film of qualified quality.

[0059] After the polyimide film is extruded, it needs to be wound on a winding shaft driven by a motor, and the rotation speed of the winding shaft is constant and consistent with the extrusion speed of the polyimide film to prevent the polyimide film from being broken when the speed is too fast, and it cannot be wound in time when the speed is too slow. In the present invention, since the amount of liquid entering is adjusted with the size of the extrusion port 5, a device that can adjust the speed of the motor according to the amount of liquid entering is urgently needed.

[0060] In order to achieve the above effect, in one embodiment, Fig.10 and Fig.11As shown, the double-drawn polyimide film forming device also includes a speed regulating mechanism 13, which includes a fixed box 131 fixedly connected to the outer wall of the extrusion head body 1, and the L-shaped push-pull rod 121 is movably inserted into the fixed box 131. The L-shaped push-pull rod 121 is located in the fixed box 131. A section of the outer fixed sleeve is provided with a fixed ring 135, and a slide 134 is fixedly connected to the outer ring wall of the fixed ring 135. The slide 134 and the resistor 132 are slidably arranged with each other, and the resistor 132 is fixedly arranged on the inner wall of the fixed box 131, and the resistor 132 and the slide 134 are respectively fixedly connected with a first terminal 133 and a second terminal 136.

[0061] The speed regulating mechanism 13 of this embodiment can regulate the speed of the motor connected to the winding shaft. Fig. 9 In the example, as the cylinder arm 975 moves downward, the size of the extrusion port 5 becomes larger, and the amount of liquid entering increases. At this time, as the L-shaped push-pull rod 121 moves downward, it will move the slide 134 downward through the fixed ring 135. The downward movement of the slide 134 will reduce the resistance in the access circuit, thereby increasing the current of the circuit, and then speeding up the motor connected to the winding shaft. The principle of the slowing process is the same as the speeding process, and will not be repeated here.

[0062] In view of the problems existing in the prior art, an embodiment of the present invention further provides a method for forming a polyimide film using the double-drawn polyimide film forming device, such as Fig.12 As shown, the method specifically comprises the following steps:

[0063] S1: Start the oral adjustment mechanism 9 to drive the first arc plate 3 and the second arc plate 4 to move upward or downward synchronously to adjust the size of the extrusion port 5;

[0064] S2: The oral regulating mechanism 9 drives the flow regulating mechanism 12 to move while adjusting the size of the extrusion port 5, so as to adjust the size of the lumen of the liquid inlet tube 11 through which the liquid can pass;

[0065] S3: The movement of the flow regulating mechanism 12 will synchronously drive the speed regulating mechanism 13 to move, so as to change the magnitude of the current flowing into the device;

[0066] S4: When the oral adjustment mechanism 9 adjusts the size of the extrusion port 5 to a preset value, the limit locking mechanism 10 locks the missing gear 971 , the first arc plate 3 and the second arc plate 4 , thereby locking the current size of the extrusion port 5 .

[0067] 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 forming device for a double-stretched polyimide film, characterized in that: The invention comprises an extrusion head body (1), and an arc-shaped tube (2) connected and fixedly arranged on the lower end of the extrusion head body (1); a first vertical baffle (6) and a second vertical baffle (7) are respectively fixedly arranged on two opposite inner side walls in a first direction of the arc-shaped tube (2); a first arc-shaped plate (3) and a second arc-shaped plate (4) are respectively slidably arranged on two opposite inner side walls in a second direction of the arc-shaped tube (2); the lower ends of the first arc-shaped plate (3), the second arc-shaped plate (4), the first vertical baffle (6) and the second vertical baffle (7) form an extrusion port (5) for extruding a polyimide film; and the first arc-shaped plate (3) and the second arc-shaped plate (4) can be synchronously slid upward or downward along the inner side wall of the arc-shaped tube (2) to adjust the size of the extrusion port (5); The invention also comprises two guiding and blocking mechanisms (8) respectively connected to the first arc plate (3) and the second arc plate (4), wherein the guiding and blocking mechanisms (8) comprise a connecting slider (81) fixed to a side of the first arc plate (3) away from the extrusion port (5), wherein the connecting slider (81) is movably arranged in a first through hole (82), wherein the first through hole (82) is provided on the arc tube (2), wherein one end of the connecting slider (81) away from the first arc plate (3) is fixedly connected to a guiding slider (83), wherein the guiding slider (83) is slidably arranged in an arc guiding groove (84), wherein the arc guiding groove (84) is provided on the arc tube (2), and wherein the arc guiding groove (84) is communicated with the first through hole (82), wherein the side walls of the guiding slider (83) and the arc guiding groove (84) are arranged to contact each other, and the side wall of the first arc plate (3) and the inner side wall of the arc tube (2) are arranged to contact each other; The oral cavity adjustment mechanism (9) further comprises two second drive gears (96) of the oral cavity adjustment mechanism (9), the second drive gears (96) are fixedly sleeved outside the first rotating rod (95), the first rotating rod (95) is rotatably plugged into the fixed cylinder (93), the fixed cylinder (93) is fixedly connected to the outer wall of the arc tube (2), a section of the first rotating rod (95) located inside the fixed cylinder (93) is fixedly sleeved with a first drive gear (94), the first drive gear (94) and the spur rack are connected to each other. (91) are meshed with each other, the spur rack (91) is slidably arranged in the second through hole (92), the second through hole (92) is opened on the arc tube (2), and the second through hole (92) and the arc guide groove (84) are connected to each other, and one end of the spur rack (91) located outside the second through hole (92) is fixedly connected to the guide slide plate (83), and the oral adjustment mechanism (9) also includes a power output mechanism (97) for driving the two second driving gears (96) to rotate counterclockwise and clockwise synchronously respectively; The extrusion head body (1) is connected to a liquid inlet pipe (11) for liquid to enter, and further comprises a flow regulating mechanism (12). The flow regulating mechanism (12) comprises a fixed support cylinder (122) fixedly plugged into the liquid inlet pipe (11) and connected to the lumen of the liquid inlet pipe (11). A blocking slide plate (123) is movably arranged in the fixed support cylinder (122). The up-and-down movement of the blocking slide plate (123) can change the amount of liquid that the liquid inlet pipe (11) allows to pass through. The size of the cavity is such that an L-shaped push-pull rod (121) is fixedly connected to the lower end surface of the blocking slide plate (123), the L-shaped push-pull rod (121) is movably plugged into the bottom plate of the fixed support cylinder (122), the free end of the L-shaped push-pull rod (121) is fixedly connected to the side wall of the cylinder arm (975), and two sealing pads (124) are movably sleeved outside the L-shaped push-pull rod (121), and the two sealing pads (124) are respectively fixedly connected to the upper end surface and the lower end surface of the bottom plate of the fixed support cylinder (122); The invention also comprises a speed regulating mechanism (13), the speed regulating mechanism (13) comprising a fixed box (131) fixedly connected to the outer side wall of the extrusion head body (1), the L-shaped push-pull rod (121) being movably plugged into the fixed box (131), a section of the L-shaped push-pull rod (121) located in the fixed box (131) having an outer fixed sleeve provided with a fixed ring (135), a sliding piece (134) being fixedly connected to the outer ring wall of the fixed ring (135), the sliding piece (134) and the resistor (132) being slidably arranged with each other, and the resistor (132) being fixedly arranged on the inner side wall of the fixed box (131), and a first wiring terminal (133) and a second wiring terminal (136) being fixedly connected to the resistor (132) and the sliding piece (134) respectively.

2. The forming device of the double-stretched polyimide film according to claim 1, characterized in that: The guiding and blocking mechanism (8) further comprises a leak-proof slide plate (85), the leak-proof slide plate (85) being fixedly arranged on the upper end of the first arc-shaped plate (3), and the leak-proof slide plate (85) and the inner side wall of the arc-shaped tube (2) being arranged to abut against each other, and the upper end of the leak-proof slide plate (85) being arranged to be an arc-shaped structure.

3. The forming device of the double-stretched polyimide film according to claim 1, characterized in that: The power output mechanism (97) comprises two missing gears (971), the two missing gears (971) respectively meshing with the two second driving gears (96), the missing gears (971) being fixedly sleeved outside the second rotating rod (972), and the second rotating rod (972) being rotatably arranged on the outer side wall of the arc tube (2), the side wall of the missing gear (971) being fixedly connected with a connecting plate (973), one end of a push-pull rod (974) being hinged on the connecting plate (973), the other end of the push-pull rod (974) being hinged on the lower end of a cylinder arm (975), the upper end of the cylinder arm (975) being fixedly connected to the driving end of a driving cylinder (976), and the driving cylinder (976) being fixedly arranged on the outer side wall of the arc tube (2).

4. The forming device of the double-stretched polyimide film according to claim 3, characterized in that: It also includes a limit locking mechanism (10), the limit locking mechanism (10) including an arc-shaped support plate (101) fixedly arranged on a side of the missing gear (971) close to the arc-shaped tube (2), the arc-shaped support plate (101) being provided with a plurality of limit locking holes (102), a limit locking rod (103) being movably inserted into one of the limit locking holes (102), the limit locking rod (103) being fixedly connected to a magnet block (105) at one end located outside the limit locking hole (102), the free surface of the magnet block (105) being fixedly connected to a plurality of guide support assemblies (106), the free end of the guide support assembly (106) being fixedly connected to an electromagnet (107), and the electromagnet (107) being fixedly arranged on the outer side wall of the arc-shaped tube (2); A plurality of the limiting locking holes (102) are arranged on the same arc line, and there is a gap between two adjacent limiting locking holes (102), the size of the gap is less than 0.5 mm, one end of the limiting locking rod (103) located in the limiting locking hole (102) is fixedly connected to a supplementary rod (104), the supplementary rod (104) is in a truncated cone structure, and the diameter of one end of the supplementary rod (104) close to the limiting locking rod (103) is larger than the diameter of the other end away from the limiting locking rod (103).

5. The double-stranded polyimide film forming device according to claim 4, characterized in that: The guide support assembly (106) comprises a guide support rod (1061), a guide support tube (1062) and a guide support spring (1063); the guide support rod (1061) is movably inserted into the guide support tube (1062); the guide support spring (1063) is wound around the outside of the guide support rod (1061); and the two ends of the guide support spring (1063) are respectively fixedly connected to the side wall of the guide support rod (1061) and the outer side wall of the guide support tube (1062).

6. A method for forming a polyimide film using the double-drawn polyimide film forming device as claimed in claim 5, characterized in that: The method specifically comprises the following steps: S1: starting the oral adjustment mechanism (9) to drive the first curved plate (3) and the second curved plate (4) to move upward or downward synchronously to adjust the size of the extrusion port (5); S2: The oral regulating mechanism (9) drives the flow regulating mechanism (12) to move while regulating the size of the extrusion port (5) so as to adjust the size of the lumen of the liquid inlet tube (11) through which the liquid can pass; S3: The movement of the flow regulating mechanism (12) will synchronously drive the speed regulating mechanism (13) to move, thereby changing the magnitude of the current flowing into the device; S4: When the oral adjustment mechanism (9) adjusts the size of the extrusion port (5) to a preset value, the limit locking mechanism (10) locks the missing gear (971), the first arc plate (3) and the second arc plate (4), thereby locking the current size of the extrusion port (5).

Images