Film casting production equipment and production method for polyimide film processing

Abstract

The present invention relates to the field of cast film production equipment, and specifically to a film casting production equipment and a production method for polyimide film processing, comprising a casting mold, the casting mold comprising a left mold and a right mold, the bottom of the right mold is fixedly connected to a thickness adjustment part, one side of the bottom of the right mold is fixedly connected to a fixing part, the upper end of the fixing part is rotatably mounted with a plurality of threaded rings, the fixing part is interspersed with a plurality of bolts, each of the bolts is respectively interspersed with a corresponding threaded ring, the bolts are matched with the internal threads of the corresponding threaded rings, the bolts are slidably connected with the fixing part, one end of the bolts is in contact with the thickness adjustment part, both ends of the fixing part are fixedly mounted with fixing plates, and a threaded rod is rotatably mounted between the two fixing plates. The present invention is arranged by the above structure, so that the present invention can uniformly adjust the size of the extrusion port, avoid the situation of uneven adjustment at various places of the extrusion port, and ensure the quality of film production.

Description

Technical Field

[0001] The invention relates to the field of cast film production equipment, in particular to a film cast production equipment. Background Art

[0002] Casting machine, also known as cast film machine, is commonly used in the continuous production of functional ceramic cast sheets into thin films. Alumina is used as the main raw material for ceramic casting. The crushed powder is first mixed with a binder, plasticizer, dispersant, and solvent to form a slurry with a certain viscosity. The slurry flows down from the hopper and is scraped and coated on a special base belt with a certain thickness by a scraper. After drying and curing, it is peeled off from the top to become a thin film of the green tape. The generated film needs to be slit, cut, and other processing on the green tape according to the size and shape of the finished product to make a rough finished product to be sintered.

[0003] However, the existing casting machine has the following shortcomings:

[0004] The extrusion die head of the existing cast film machine requires multiple pressure bolts to adjust the size of the extrusion port to achieve uniform extrusion of the cast film. However, the multiple pressure bolts cannot be adjusted uniformly and need to be adjusted manually one by one, which not only consumes a lot of manpower but also easily causes the extruded cast film to be laterally uneven.

[0005] In the production process of polyimide film, the cast film needs to be slit. According to different production requirements, the required slitting width is different, and the distance between the slitting knives needs to be adjusted. However, the slitting knives of the existing slitting mechanism need to be adjusted one by one, and multiple slitting knives cannot be adjusted uniformly, which is inconvenient to operate. Summary of the invention

[0006] The purpose of the present application is to provide a film casting production equipment, the bottom of the right mold is fixedly connected to the thickness adjusting part, one side of the bottom of the right mold is fixedly connected to the fixing part, the upper end of the fixing part is rotatably installed with multiple threaded rings, the inside of the threaded ring is provided with an internal thread, the outside of the threaded ring is provided with an external thread, and multiple bolts are inserted into the fixing part, each bolt is respectively inserted into the corresponding threaded ring, the bolt cooperates with the internal thread of the corresponding threaded ring, the bolt is slidably connected with the fixing part, one end of the bolt contacts the thickness adjusting part, both ends of the fixing part are fixedly installed with fixing plates, a threaded rod is rotatably installed between the two fixing plates, the threaded rod cooperates with the external threads of multiple threaded rings, the threaded rod is driven to rotate by a motor, and the multiple threaded rings are driven to rotate synchronously, and the multiple threaded rings drive the multiple bolts to push the thickness adjusting part closer to the left mold, so as to achieve the effect of adjusting the size of the extrusion port. This adjustment method avoids the situation of uneven adjustment at various places of the extrusion port, and ensures the quality of film production.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a film casting production equipment, comprising a casting mold, the casting mold comprising a left mold and a right mold, the adjacent sides of the left mold and the right mold are respectively provided with a concave left mold cavity and a right mold cavity, the bottom of the right mold is fixedly connected to a thickness adjustment part, and one side of the bottom of the right mold is fixedly connected to a fixing part, a plurality of threaded rings are rotatably mounted on the upper end of the fixing part, the interior of the threaded ring is provided with an internal thread, and the exterior of the threaded ring is provided with an external thread, a plurality of bolts are inserted through the fixing part, each of the bolts is respectively inserted through a corresponding threaded ring, the bolts cooperate with the internal threads of the corresponding threaded ring, the bolts are slidably connected to the fixing part, one end of the bolts contacts the thickness adjustment part, mounting plates are fixedly mounted on both ends of the fixing part, a threaded rod is rotatably mounted between the two mounting plates, the threaded rod cooperates with the external threads of the plurality of threaded rings, a motor is fixedly mounted on one of the mounting plates, and the output end of the motor is fixedly connected to one end of the threaded rod.

[0008] Preferably, it also includes a slitting mechanism, which includes a frame, a lifting frame, a lifting rod, a plurality of sliding sleeves, a guide rail and a plurality of cutter assemblies, the lifting frame is slidably installed on the top of the frame, a cylinder is fixedly installed on the upper end of the frame, the telescopic end of the cylinder passes through the upper end of the frame and is fixedly connected to the upper end of the lifting frame, the lifting rod is fixedly installed on the lifting frame, a plurality of sliding sleeves are sleeved on the lifting rod, the guide rail is slidably installed in the middle of the frame, a plurality of cutter assemblies are slidably installed on the guide rail, two linkage rods are rotatably installed on the bottom of the sliding sleeve, and one end of the two linkage rods is rotatably connected to the tops of two corresponding cutter assemblies respectively;

[0009] A first fixing bolt is threadedly mounted on the middle sliding sleeve, second fixing bolts are threadedly mounted on both ends of the guide rail, and a third fixing bolt is mounted on the cutter assembly.

[0010] Preferably, the cutter assembly comprises a slider, a cutter seat, a first telescopic rod, a first frame, a cutter and two positioning rollers, the slider is slidably mounted on the guide rail, a connecting block is fixedly mounted on the upper end of the slider, both sides of the connecting block are rotatably connected to one end of the corresponding linkage rod, the third fixing bolt is threadedly mounted on the connecting block, the cutter seat is fixedly mounted on the lower end of the slider, a first cavity is provided inside the cutter seat, the first telescopic rod is inserted into the cavity, and the first telescopic rod is slidably connected to the cutter seat, a first spring is provided in the cavity, one end of the first spring is fixedly connected to the upper end of the first telescopic rod, the first frame is fixedly mounted on the lower end of the first telescopic rod, the two positioning rollers are rotatably mounted on both sides of the first frame, a second cavity is provided inside the first telescopic rod, the upper end of the cutter is inserted through the first frame into the second cavity, and the cutter is slidably connected to the first telescopic rod, a second spring is provided in the second cavity, one end of the second spring is fixedly connected to the upper end of the cutter, and the cutter is arranged between the two positioning rollers.

[0011] Preferably, the cutter assembly also includes a second telescopic rod, a second frame and a flattening roller, the second telescopic rod is inserted into the cavity, and the second telescopic rod is slidably connected to the cutter seat, a third spring is arranged in the cavity, one end of the third spring is fixedly connected to the upper end of the second telescopic rod, the second frame is fixedly installed on the lower end of the second telescopic rod, and the flattening roller is rotatably installed on the bottom of the second frame.

[0012] Preferably, the length of the second jig is greater than that of the first jig, and the position of the flattening roller corresponds to the position of the cutter.

[0013] Preferably, the casting mold is fixedly installed on one side of the frame, a conveyor belt is installed on one side of the frame through a rotating roller, the casting mold is arranged above the conveyor belt, a feed roller is fixedly installed in the middle of the frame, the feed roller is arranged directly below the flattening roller, and the upper end surface of the feed roller is in the same plane as the upper end surface of the conveyor belt.

[0014] Preferably, a deformation cavity is provided at the bottom of the right mold, and the deformation cavity is filled with a heat preservation block. A fixing plate is provided between the heat preservation block and the bolt, and one side of the fixing plate is in contact with the thickness adjustment part.

[0015] Preferably, a plurality of electric heating plates are provided inside the left mold and the right mold, and electric connectors are provided at both ends of the left mold and the right mold, and each of the electric heating plates is electrically connected to the corresponding electric connector.

[0016] The present invention also discloses a production method for processing a polyimide film using the above-mentioned film casting production equipment, and the steps are as follows:

[0017] The starting motor drives the threaded rod to rotate, and the threaded rod drives multiple threaded rings to rotate synchronously, thereby driving multiple bolts to slide along the fixing part. The thickness adjustment part deflects as the position of the bolt end moves, and the extrusion port is changed to a suitable size according to the thickness of the film to be produced;

[0018] The polyimide is melted and injected into the casting mold. The casting mold extrude the polyimide solution and then cools to form a polyimide film, which is then transported by a conveyor belt and a feed roller. The guide rail is fixed by a second fixing bolt, and the driving cylinder drives the lifting frame to move up and down. The lifting rod moves up and down with the lifting frame, and the distance between the lifting rod and the guide rail changes. The angle of the linkage rod changes, and each cutter assembly is pushed to move. The distance between two adjacent cutter assemblies changes. The distance between adjacent cutter assemblies is adjusted to a suitable degree according to the required film width.

[0019] Loosen the second fixing bolt, tighten the third fixing bolt, drive the cylinder to push the lifting frame down, and the cutter assembly moves downward accordingly. The cutter contacts and cuts the film, and then the positioning roller and the flattening roller contact and press the film, and the film is cut during the conveying process.

[0020] In summary, the technical effects and advantages of the present invention are as follows:

[0021] 1. In the present invention, the bottom of the right mold is fixedly connected to the thickness adjusting part, and one side of the bottom of the right mold is fixedly connected to the fixing part. A plurality of threaded rings are rotatably installed on the upper end of the fixing part. An internal thread is arranged inside the threaded ring, and an external thread is arranged outside the threaded ring. A plurality of bolts are inserted through the fixing part, and each bolt is respectively inserted through the corresponding threaded ring. The bolt cooperates with the internal thread of the corresponding threaded ring. The bolt is slidably connected with the fixing part, and one end of the bolt contacts the thickness adjusting part. A fixing plate is fixedly installed at both ends of the fixing part, and a threaded rod is rotatably installed between the two fixing plates. The threaded rod cooperates with the external threads of the plurality of threaded rings. The threaded rod is driven to rotate by a motor to drive the plurality of threaded rings to rotate synchronously. The plurality of threaded rings drive the plurality of bolts to push the thickness adjusting part closer to the left mold, so as to achieve the effect of adjusting the size of the extrusion port. This adjustment method avoids the situation of uneven adjustment at various places of the extrusion port, and ensures the quality of film production.

[0022] 2. In the present invention, a lifting rod and a guide rail are arranged in parallel, and the cutter assembly is slidably installed on the guide rail. A sleeve is provided on the lifting rod. Two adjacent cutter assemblies are connected to the corresponding sleeve through a linkage rod. By adjusting the distance between the lifting rod and the guide rail, the spacing between several cutting knives can be adjusted synchronously, and the spacing between adjacent cutting knives can be ensured to be equal. The operation is simple, the accuracy is higher, and it is more in line with existing production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the casting mold of the present invention;

[0026] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0027] Figure 4 It is a cut-away side view of the casting die of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the slitting mechanism of the present invention;

[0029] Figure 6 It is a schematic diagram of the cut structure of the slitting mechanism of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the cutter assembly of the present invention;

[0031] Figure 8 It is a schematic diagram of the cutaway structure of the cutter assembly of the present invention.

[0032] In the figure: 1. cast film mold; 101. left mold; 102. right mold; 103. thickness adjustment part; 104. fixing part; 105. threaded ring; 106. bolt; 107. mounting plate; 108. threaded rod; 109. deformation chamber; 110. insulation block; 111. fixing plate; 2. slitting mechanism; 201. frame; 202. lifting frame; 203. lifting rod; 204. sliding sleeve; 205. guide rail; 206. cutter assembly; 2061. slider; 2062. cutter seat; 2063. first telescopic rod; 2064. first frame; 2065. cutter; 2066. positioning roller; 2067. second telescopic rod; 2068. second frame; 2069. flattening roller; 207. linkage rod; 208. conveyor belt; 209. feed roller. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0034] Example 1: Reference Figure 1-Figure 4 The film casting production equipment shown in the figure comprises a casting mold 1, wherein the casting mold 1 comprises a left mold 101 and a right mold 102, wherein adjacent sides of the left mold 101 and the right mold 102 are respectively provided with a concave left mold cavity and a right mold cavity, wherein the bottom of the right mold 102 is fixedly connected to a thickness adjustment part 103, wherein the thickness adjustment part 103 is made of elastic material, and one side of the bottom of the right mold 102 is fixedly connected to a fixing part 104, wherein a plurality of threaded rings 105 are rotatably mounted on the upper end of the fixing part 104, wherein the interior of the threaded ring 105 is provided with an internal thread, and the exterior of the threaded ring 105 is provided with an external thread, wherein a plurality of bolts 106 are inserted through the fixing part 104, wherein each of the bolts 106 is respectively inserted through the corresponding threaded ring 105, wherein the bolts 106 cooperate with the internal thread of the corresponding threaded ring 105, and wherein the bolts 106 are in contact with the fixing part 104. Sliding connection, one end of the bolt 106 is in contact with the thickness adjusting part 103, and both ends of the fixing part 104 are fixedly installed with mounting plates 107, and a threaded rod 108 is rotatably installed between the two mounting plates 107, and the threaded rod 108 cooperates with the external threads of multiple threaded rings 105, and a motor is fixedly installed on one of the mounting plates 107, and the output end of the motor is fixedly connected to one end of the threaded rod 108, and the motor is started to drive the threaded rod 108 to rotate, and the threaded rod 108 drives the multiple threaded rings 105 to rotate synchronously, thereby driving the multiple bolts 106 to slide along the fixing part 104, and the thickness adjusting part 103 deflects as the position of the end of the bolt 106 moves, and the extrusion port is changed to a suitable size according to the thickness of the film to be produced. This adjustment method avoids the situation of uneven adjustment at various places of the extrusion port, thereby ensuring the quality of film production.

[0035] Embodiment 2 is different from the above embodiment in that Figure 5 and Figure 6As shown, it also includes a slitting mechanism 2, which includes a frame 201, a lifting frame 202, a lifting rod 203, a plurality of sliding sleeves 204, a guide rail 205 and a plurality of cutter assemblies 206. The lifting frame 202 is slidably installed at the top of the frame 201, and a cylinder is fixedly installed on the upper end of the frame 201. The telescopic end of the cylinder passes through the upper end of the frame 201 and is fixedly connected to the upper end of the lifting frame 202. The lifting rod 203 is fixedly installed on the lifting frame 202, and the plurality of sliding sleeves 204 are all sleeved on the lifting rod 203. The guide rail 205 is slidably installed in the middle part of the frame 201, and the plurality of cutter assemblies 206 are all slidably installed on the guide rail 205. Two linkage rods 207 are rotatably installed at the bottom of the sliding sleeve 204, and one end of the two linkage rods 207 is respectively connected to the top of two corresponding cutter assemblies 206. Rotational connection; a first fixing bolt is threadedly installed on the middle sliding sleeve 204, and second fixing bolts are threadedly installed on both ends of the guide rail 205. A third fixing bolt is installed on the cutter assembly 206, and the guide rail 205 is fixed by the second fixing bolt. The driving cylinder drives the lifting frame 202 to move up and down, and the lifting rod 203 is lifted and lowered with the lifting frame 202. The distance between the lifting rod 203 and the guide rail 205 changes, and the angle of the linkage rod 207 changes, which pushes each cutter assembly 206 to move, and the distance between two adjacent cutter assemblies 206 changes. According to the width of the film to be cut, the distance between adjacent cutter assemblies 206 is adjusted to an appropriate degree, and then the second fixing bolt is loosened, and the third fixing bolt is tightened. The driving cylinder pushes the lifting frame 202 to descend, and the cutter assembly 206 moves downward and contacts the film to cut the film.

[0036] Embodiment 3 is different from the above embodiment in that Figure 7 and Figure 8As shown, the cutter assembly 206 includes a slider 2061, a cutter seat 2062, a first telescopic rod 2063, a first frame 2064, a cutter 2065 and two positioning rollers 2066. The slider 2061 is slidably mounted on the guide rail 205. A connecting block is fixedly mounted on the upper end of the slider 2061. Both sides of the connecting block are rotatably connected to one end of the corresponding linkage rod 207. The third fixing bolt is threadedly mounted on the connecting block. The cutter seat 2062 is fixedly mounted on the lower end of the slider 2061. A first cavity is provided inside the cutter seat 2062. The first telescopic rod 2063 is inserted into the cavity, and the first telescopic rod 2063 is slidably connected to the cutter seat 2062. A first spring is provided in the cavity. One end of the first spring is fixedly connected to the upper end of the first telescopic rod 2063. The first frame 2064 is fixedly mounted on the lower end of the first telescopic rod 2063. The two positioning rollers 2066 are rotatably mounted respectively. Installed on both sides of the first frame 2064, the interior of the first telescopic rod 2063 is provided with a second cavity, the upper end of the cutter 2065 is inserted through the first frame 2064 into the second cavity, and the cutter 2065 is slidably connected to the first telescopic rod 2063, a second spring is provided in the second cavity, one end of the second spring is fixedly connected to the upper end of the cutter 2065, the cutter 2065 is arranged between two positioning rollers 2066, during the descending process of the cutter assembly 2066, the cutter 2065 first contacts the film, the cutter assembly 206 continues to descend, the cutter 2065 pierces the film, and begins to compress the second spring, then the positioning roller 2066 contacts the film and compresses the first spring, the cutter 2065 cuts the film, the positioning roller 2066 presses the two sides of the cut part of the film to prevent the cut part of the film from curling, the elastic installation method of the cutter 2065 enables it to adapt to the thickness of the film to prevent the cutter 2065 from incompletely cutting the film.

[0037] Embodiment 4 is different from the above embodiments in that the cutter assembly 206 also includes a second telescopic rod 2067, a second frame 2068 and a flattening roller 2069. The second telescopic rod 2067 is inserted into the cavity, and the second telescopic rod 2067 is slidably connected to the cutter seat 2062. A third spring is arranged in the cavity, and one end of the third spring is fixedly connected to the upper end of the second telescopic rod 2067. The second frame 2068 is fixedly installed on the lower end of the second telescopic rod 2067. The flattening roller 2069 is rotatably installed on the bottom of the second frame 2068. The flattening roller 2069 descends with the cutter assembly 206, and starts to compress the third spring after contacting the film. The flattening roller 2069 presses the cut part of the film to further prevent curling of the cut part of the film.

[0038] The length of the second frame 2068 is greater than that of the first frame 2064, so that the positioning roller 2066 and the flattening roller 2069 can contact the film at the same time. The position of the flattening roller 2069 corresponds to the position of the cutter 2065, and can flatten both sides of the slitting part at the same time.

[0039] The casting mold 1 is fixedly installed on one side of the frame 201, and a conveyor belt 208 is installed on one side of the frame 201 through a rotating roller. The casting mold 1 is arranged above the conveyor belt 208. A feed roller 209 is fixedly installed in the middle of the frame 201. The feed roller 209 is arranged directly below the flattening roller 2069, and the upper end surface of the feed roller 209 is in the same plane as the upper end surface of the conveyor belt 208 to transport the film. The feed roller 209 plays a bearing role on the film and cooperates with the cutter assembly 206 to cut and extrude the film.

[0040] A deformation cavity 109 is provided at the bottom of the right mold 102, and the deformation cavity 109 is filled with an insulation block 110. The insulation block 110 can be made of a calcium silicate board or other materials with high temperature resistance and heat preservation effects. In actual use, the setting of the insulation block 110 can fill the deformation cavity 109 and play a role in heat preservation to avoid excessive heat dissipation at this position and affect the production of the film. A fixing plate 111 is provided between the insulation block 110 and the bolt 106, and one side of the fixing plate 111 is in contact with the thickness adjustment part 103 to fix the insulation block 110.

[0041] The left mold 101 and the right mold 102 are each provided with a plurality of electric heating plates inside, and both ends of the left mold 101 and the right mold 102 are provided with electric connectors, and each of the electric heating plates is electrically connected to the corresponding electric connector. When the electric connector is energized, the electric heating plates start to generate heat, thereby heating the liquid in the casting mold 1 to prevent the liquid from solidifying and affecting the casting effect.

[0042] Working principle:

[0043] The motor is started to drive the threaded rod 108 to rotate, and the threaded rod 108 drives the multiple threaded rings 105 to rotate synchronously, thereby driving the multiple bolts 106 to slide along the fixing part 104, and the thickness adjustment part 103 deflects as the position of the end of the bolt 106 moves, and the extrusion port is changed to a suitable size according to the thickness of the film to be produced;

[0044] The polyimide is melted and injected into the casting mold 1. The casting mold 1 extrude the polyimide solution and then cools it to form a polyimide film, which is then transported by the conveyor belt 208 and the feed roller 209. The guide rail 205 is fixed by the second fixing bolt, and the driving cylinder drives the lifting frame 202 to move up and down. The lifting rod 203 moves up and down with the lifting frame 202. The distance between the lifting rod 203 and the guide rail 205 changes, and the angle of the linkage rod 207 changes, which pushes each cutter assembly 206 to move, and the distance between two adjacent cutter assemblies 206 changes. According to the required film width, the distance between adjacent cutter assemblies 206 is adjusted to a suitable degree;

[0045] Loosen the second fixing bolt, tighten the third fixing bolt, drive the cylinder to push the lifting frame 202 down, and the cutter assembly 206 moves downward accordingly. The cutter 2065 contacts and cuts the film, and then the positioning roller 2066 and the flattening roller 2069 both contact and press the film, and the film is cut during the conveying process.

[0046] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A film casting production equipment, comprising a casting mold, the casting mold comprising a left mold and a right mold, the adjacent sides of the left mold and the right mold are respectively provided with a concave left mold cavity and a concave right mold cavity, characterized in that: The bottom of the right mold is fixedly connected to the thickness adjusting part, and one side of the bottom of the right mold is fixedly connected to the fixing part, and a plurality of threaded rings are rotatably installed on the upper end of the fixing part, and the interior of the threaded ring is provided with an internal thread, and the exterior of the threaded ring is provided with an external thread, and a plurality of bolts are inserted through the fixing part, and each of the bolts is respectively inserted through the corresponding threaded ring, and the bolt cooperates with the internal thread of the corresponding threaded ring, and the bolt is slidably connected to the fixing part, and one end of the bolt contacts the thickness adjusting part, and mounting plates are fixedly installed at both ends of the fixing part, and a threaded rod is rotatably installed between the two mounting plates, and the threaded rod cooperates with the external threads of the plurality of threaded rings, and a motor is fixedly installed on one of the mounting plates, and the output end of the motor is fixedly connected to one end of the threaded rod; It also includes a slitting mechanism, which includes a frame, a lifting frame, a lifting rod, a plurality of sliding sleeves, a guide rail and a plurality of cutter assemblies. The lifting frame is slidably installed on the top of the frame, a cylinder is fixedly installed on the upper end of the frame, the telescopic end of the cylinder passes through the upper end of the frame and is fixedly connected to the upper end of the lifting frame, the lifting rod is fixedly installed on the lifting frame, a plurality of sliding sleeves are sleeved on the lifting rod, the guide rail is slidably installed in the middle of the frame, a plurality of cutter assemblies are slidably installed on the guide rail, two linkage rods are rotatably installed on the bottom of the sliding sleeve, and one end of the two linkage rods is rotatably connected to the tops of two corresponding cutter assemblies respectively; A first fixing bolt is threadedly mounted on the middle sliding sleeve, second fixing bolts are threadedly mounted on both ends of the guide rail, and a third fixing bolt is mounted on the cutter assembly.

2. A film casting production equipment according to claim 1, characterized in that: The cutter assembly includes a slider, a cutter seat, a first telescopic rod, a first frame, a cutter and two positioning rollers. The slider is slidably mounted on the guide rail. A connecting block is fixedly mounted on the upper end of the slider. Both sides of the connecting block are rotatably connected to one end of the corresponding linkage rod. The third fixing bolt is threadedly mounted on the connecting block. The cutter seat is fixedly mounted on the lower end of the slider. A first cavity is provided inside the cutter seat. The first telescopic rod is inserted into the cavity, and the first telescopic rod is slidably connected to the cutter seat. A first spring is provided in the cavity, and one end of the first spring is fixedly connected to the upper end of the first telescopic rod. The first frame is fixedly mounted on the lower end of the first telescopic rod. The two positioning rollers are rotatably mounted on both sides of the first frame respectively. A second cavity is provided inside the first telescopic rod. The upper end of the cutter is inserted through the first frame into the second cavity, and the cutter is slidably connected to the first telescopic rod. A second spring is provided in the second cavity, and one end of the second spring is fixedly connected to the upper end of the cutter. The cutter is arranged between the two positioning rollers.

3. A film casting production equipment according to claim 2, characterized in that: The cutter assembly also includes a second telescopic rod, a second frame and a flattening roller. The second telescopic rod is inserted into the cavity and is slidably connected to the cutter seat. A third spring is provided in the cavity. One end of the third spring is fixedly connected to the upper end of the second telescopic rod. The second frame is fixedly installed at the lower end of the second telescopic rod, and the flattening roller is rotatably installed at the bottom of the second frame.

4. A film casting production equipment according to claim 3, characterized in that: The length of the second jig is greater than that of the first jig, and the position of the flattening roller corresponds to the position of the cutter.

5. The film casting production equipment according to claim 3, characterized in that: The casting mold is fixedly installed on one side of the frame, a conveyor belt is installed on one side of the frame through a rotating roller, the casting mold is arranged above the conveyor belt, a feed roller is fixedly installed in the middle of the frame, the feed roller is arranged directly below the flattening roller, and the upper end surface of the feed roller and the upper end surface of the conveyor belt are in the same plane.

6. The film casting production equipment according to claim 1, characterized in that: A deformation cavity is provided at the bottom of the right mold, and a heat preservation block is filled in the deformation cavity. A fixing plate is provided between the heat preservation block and the bolt, and one side of the fixing plate is fitted with the thickness adjustment part.

7. The film casting production equipment according to claim 1, characterized in that: A plurality of electric heating plates are disposed inside the left mold and the right mold, and electric connectors are disposed at both ends of the left mold and the right mold, and each of the electric heating plates is electrically connected to a corresponding electric connector.

8. A method for producing a polyimide film using the film casting production equipment according to any one of claims 1 to 7, the steps of which are as follows: The starting motor drives the threaded rod to rotate, and the threaded rod drives multiple threaded rings to rotate synchronously, thereby driving multiple bolts to slide along the fixing part. The thickness adjustment part deflects as the position of the bolt end moves, and the extrusion port is changed to a suitable size according to the thickness of the film to be produced; The polyimide is melted and injected into the casting mold. The casting mold extrude the polyimide solution and then cools to form a polyimide film, which is then transported by a conveyor belt and a feed roller. The guide rail is fixed by a second fixing bolt, and the driving cylinder drives the lifting frame to move up and down. The lifting rod moves up and down with the lifting frame, and the distance between the lifting rod and the guide rail changes. The angle of the linkage rod changes, and each cutter assembly is pushed to move. The distance between two adjacent cutter assemblies changes. The distance between adjacent cutter assemblies is adjusted to a suitable degree according to the required film width. Loosen the second fixing bolt, tighten the third fixing bolt, drive the cylinder to push the lifting frame down, and the cutter assembly moves downward accordingly. The cutter contacts and cuts the film, and then the positioning roller and the flattening roller contact and press the film, and the film is cut during the conveying process.

Images