An ultra-thin capacitor film stretching production line and stretching method thereof

Abstract

The present invention relates to the field of film processing technology, and in particular to an ultra-thin capacitor film stretching production line and a stretching method thereof, comprising a shell, wherein one end of the inner side of the shell is rotatably provided with a plurality of stretching rollers, and the other end of the upper side of the shell is provided with a cold air blower, and an anti-shrinkage device is provided at a position corresponding to the cold air blower inside the shell; the anti-shrinkage device comprises two long slide grooves opened on both sides of the shell, and the inner sides of the two long slide grooves are both slidably connected with a large slider. The present invention uses the anti-shrinkage device and the reciprocating drive mechanism therein, and in the cooling and shaping process after the capacitor film is heated and stretched, the stretching force of the capacitor film in the cooling process can be continuously adjusted, so that the shrinkage force of the capacitor film during cooling is more fully offset by the stretching force, thereby avoiding a large shrinkage of the capacitor film during cooling, improving the cooling and shaping effect of the capacitor film, and thus improving the stretching processing quality of the capacitor film.

Description

Technical Field

[0001] The invention relates to the technical field of film processing, and in particular to an ultra-thin capacitor film stretching production line and a stretching method thereof. Background Art

[0002] Film capacitors use metal foil as electrodes, overlap it with plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate from both ends, and then roll it into a cylindrical structure.

[0003] The capacitor film needs to be stretched during processing. The molecules of the stretched capacitor film will be arranged neatly, which can increase the dielectric constant of the capacitor film and the capacitance of the capacitor. At the same time, the capacitor film can also be stretched to improve the mechanical properties and thermal stability of the capacitor film, making the manufactured film capacitor more durable.

[0004] After searching, a Chinese patent with publication number: CN113927886A discloses a film stretching machine, which includes a support frame, a water tank is movably connected to one side of the inner bottom wall of the support frame, a sensor is fixedly connected to the top of the inner wall of the water tank, and a water inlet pipe is fixedly connected to the top of the outer surface of the water tank.

[0005] Based on the above search and combined with actual problems, it is found that: the capacitor film needs to be heated before stretching, and then the capacitor film is stretched by rollers, and then cooled after stretching to achieve shaping. Due to the influence of thermal expansion and contraction, the capacitor film itself will produce a certain shrinkage force when cooling, and the shrinkage force will cause the capacitor film to shrink significantly, thereby reducing the shaping effect of the capacitor film and reducing the stretching processing quality of the capacitor film. Summary of the invention

[0006] The object of the present invention is to provide an ultra-thin capacitor film stretching production line and a stretching method thereof to solve the problems raised in the above background technology.

[0007] The technical solution of the present invention is: an ultra-thin capacitor film stretching production line, comprising an outer shell, a plurality of stretching rollers are rotatably arranged at one end of the inner side of the outer shell, and a cold air blower is arranged at the other end of the upper side of the outer shell, and an anti-shrinkage device is arranged at the position of the cold air blower inside the outer shell; the anti-shrinkage device comprises two long slide grooves opened on both sides of the outer shell, the inner sides of the two long slide grooves are slidably connected with large sliders, the upper sides of the two large sliders are located at the middle position and an upper rod is arranged through a first movable structure, and two lower rods are movably arranged at both ends of the two large sliders through a second movable structure, the outer sides of the two lower rods and the upper rod are rotatably connected with pulling rollers, and the two ends of the upper rod are symmetrically rotatably connected with four push-pull rods, and one end of the four push-pull rods is rotatably connected to the two ends of the two lower rods respectively; a reciprocating drive mechanism is arranged between the two large sliders and the outer shell.

[0008] Preferably, the first movable structure includes two top blocks fixed at both ends of the outer side of the upper rod, and the lower ends of the two top blocks are fixed with two vertical rods which are slidably inserted into the two large sliding blocks respectively, and the two top blocks and the two large sliding blocks are elastically connected by springs.

[0009] Preferably, the second movable structure includes four short slide grooves respectively opened at both ends of the two large sliders, the inner sides of the four short slide grooves are slidably connected with small sliders, and the two ends of the two lower rods are respectively fixed to the corresponding two small sliders.

[0010] Preferably, the reciprocating drive mechanism includes two slide rods fixed on one side of the two large sliders and two wheel axles that are rotatably connected to the inside of the outer shell, two pulleys are fixed at both ends of the two wheel axles, the outer sides of the two pulleys on the same side are connected by synchronous belt transmission, one side of the two synchronous belts is rotatably connected with rollers, one end of the two slide rods is provided with roller grooves, the two rollers are respectively rollingly connected to the inner sides of the two roller grooves, and a rotating drive mechanism is arranged between one of the wheel axles and the outer shell.

[0011] Preferably, the rotary drive mechanism comprises a driven gear fixed to one end of the outer side of the wheel shaft and a drive motor installed on the outer side of the housing, and a driving gear meshing with the driven gear is fixed to the driving end of the drive motor.

[0012] Preferably, a roller lift adjustment mechanism is provided at a position of the outer shell corresponding to the upper rod, and the roller lift adjustment mechanism includes a linkage shaft rotatably connected to the inner part of the outer shell and located above the pulling roller, and an adjusting motor installed on the outer side of the outer shell, a worm is fixed to the driving end of the adjusting motor, a worm wheel meshing with the worm is fixed to one end of the linkage shaft, and two extension rods are fixed to the outer ends of the linkage shaft at the inner side of the outer shell, and guide plates are fixed to the lower ends of the two extension rods, and the lower side surfaces of the two guide plates are respectively in contact with the two ends of the upper rod.

[0013] Preferably, the shell is provided with two traction mechanisms at one end of the air cooler, the traction mechanism comprising a traction motor installed on the outside of the shell and two traction rollers rotatably connected to the inside of the shell, one end of the two traction rollers are fixed with traction roller gears that mesh with each other, and the driving end of the traction motor is fixedly connected to one end of one of the traction rollers.

[0014] Preferably, two slots are provided at one end of the shell near the stretching roller, and a winding roller is provided on the inner side of the shell near the stretching roller. The two ends of the winding roller are rotatably connected to the inner sides of the two slots through bearings, and one end of the two slots is fixed with two clamping blocks for clamping the two ends of the winding roller by bolts.

[0015] Preferably, the plurality of stretching rollers are all electrically heated rollers, and the plurality of stretching rollers are arranged in a staggered manner.

[0016] The present invention also provides an ultra-thin capacitor film stretching method, which specifically comprises the following steps:

[0017] Step 1: The traction motors of the two traction mechanisms rotate at the same speed, and the traction motors drive the traction rollers to rotate. The traction rollers drive the other traction rollers to rotate in the opposite direction through the meshing of the two traction roller gears at the end. The four traction rollers of the two traction mechanisms simultaneously pull the capacitor film, so that the capacitor film passes through multiple stretching rollers in sequence. At the same time, the stretching rollers heat the capacitor film to reduce the force between the internal molecular chains and the crystal planes of the plastic material in the capacitor film, and the capacitor film is longitudinally stretched and extended. The stretched capacitor film passes under the cold air blower, and the cold air blower generates cold air to cool the stretched capacitor film, so that the capacitor film is quickly shaped;

[0018] Step 2: Through the continuous reciprocating movement of the anti-shrinkage device, the two large sliders of the anti-shrinkage device drive the two lower rods and one upper rod to move synchronously when moving back and forth, thereby driving the three pulling rollers to move, and the vertical rod of the first movable structure can guide the top block to move up and down in the vertical direction, so that the upper rod and a pulling roller on its outer side move up and down vertically, and the upper pulling roller presses on the upper side of the capacitor film, and the lower two pulling rollers support the lower side of the capacitor film. Under the action of the three pulling rollers, a certain pulling force is applied to the capacitor film. At the same time, the three pulling rollers move back and forth with the large slider, and continuously apply a certain pulling force to the capacitor film being cooled, so that the pulling force on the capacitor film and its own shrinkage force are offset;

[0019] The worm gear is driven to rotate by the regulating motor of the roller lift regulating mechanism, and the worm gear drives the worm wheel to rotate, thereby driving the linkage shaft to rotate. The linkage shaft drives the two guide plates to rotate through the two extension rods, and changes the inclination angle of the two guide plates, so that the end of the two guide plates close to the high-temperature capacitor membrane rotates downward, and the end of the two guide plates close to the low-temperature capacitor membrane rotates upward. When the anti-shrinkage device moves to the high-temperature position close to the capacitor membrane, the upper rod is guided by the guide plate and gradually lowers its height. The upper rod drives the two top blocks to move downward, and the two top blocks respectively drive the vertical rods at the lower ends to move toward the inside of the large slider and compress the spring. At the same time, the upper rod drives the pulling roller located above its outer side to move vertically downward, reducing the height difference between the upper and lower pulling rollers, thereby increasing the pressure of the upper pulling roller on the upper side of the capacitor membrane. When the upper rod moves downward, it drives the four push-pull rods at both ends to rotate to a horizontal angle. The four push-pull rods Thrust is applied to the two lower rods respectively, thereby driving the two lower rods and the four small sliders to move to both sides along the short slide groove, increasing the distance between the two lower rods and the spacing between the two pulling rollers below, so that a section of the capacitor film between the three pulling rollers is bent with a larger arc, thereby increasing the pulling force applied to the capacitor film and increasing the degree of stretching of the capacitor film. The larger pulling force offsets the larger shrinkage force of the capacitor film. As the temperature of the capacitor film decreases, when the anti-shrinkage device moves to a place close to the low temperature of the capacitor film, the end of the guide plate close to the low temperature is higher, and the upper rod and an upper pulling roller automatically increase in height under the elastic force of the spring, thereby reducing the height difference between the upper and lower pulling rollers, reducing the pressure of the upper pulling roller on the capacitor film, and reducing the degree of bending of the upper pulling roller on the capacitor film, thereby reducing the pulling force on the capacitor film, making the pulling force on the capacitor film at the low temperature closer to its shrinkage force.

[0020] The present invention provides an ultra-thin capacitor film stretching production line and a stretching method thereof by improvement, which has the following improvements and advantages compared with the prior art:

[0021] First, the present invention uses an anti-shrinkage device and a reciprocating drive mechanism therein to continuously stretch the capacitor film during cooling and shaping process after the capacitor film is heated and stretched, so that the shrinkage force and the stretching force to which the capacitor film is subjected during cooling can be more fully offset, thereby effectively avoiding large shrinkage of the capacitor film during cooling, improving the cooling and shaping effect of the capacitor film, and thus improving the stretching processing quality of the capacitor film.

[0022] Secondly, the present invention uses a roller lift adjustment mechanism, and when the anti-shrinkage device is located in different temperature sections of the capacitor film, different stretching forces can be applied to the capacitor film. When it is located at a high temperature of the capacitor film, the stretching force on the capacitor film can be increased, thereby fully offsetting the shrinkage force of the capacitor film in the high temperature section. When it is located at a low temperature of the capacitor film, the stretching force on the capacitor film can be reduced, thereby offsetting the smaller shrinkage force of the capacitor film in the low temperature section, thereby further improving the cooling and shaping effect of the capacitor film. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the structure of the present invention from a first viewing angle;

[0025] Figure 2 It is a schematic diagram of the structure of the second viewing angle of the present invention;

[0026] Figure 3 It is a first cross-sectional structural schematic diagram of the present invention;

[0027] Figure 4 For the present invention Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0028] Figure 5 It is a second cross-sectional structural schematic diagram of the present invention;

[0029] Figure 6 It is a schematic diagram of the disassembled structure of the anti-shrinkage device in the present invention;

[0030] Figure 7 It is a structural schematic diagram of the first active structure and the second active structure in the present invention;

[0031] Figure 8 It is a schematic diagram of the structure when the capacitor film is stretched according to the present invention.

[0032] Reference numerals:

[0033] 1. Shell; 2. Stretching roller; 3. Cooling fan; 4. Pulling roller; 5. Pulling motor; 6. Pulling roller gear; 7. Roller; 8. Slot; 9. Tightening block; 101. Long slide; 102. Large slider; 103. Upper rod; 104. Short slide; 105. Small slider; 106. Lower rod; 107. Pulling roller; 108. Vertical rod; 109. Top block; 110. Spring; 111. Push-pull rod; 201. Wheel axle; 202. Pulley; 203. Synchronous belt; 204. Roller; 205. Slide rod; 206. Roller groove; 207. Driven gear; 208. Driving motor; 209. Driving gear; 301. Linkage shaft; 302. Extension rod; 303. Guide plate; 304. Worm wheel; 305. Adjusting motor; 306. Worm. DETAILED DESCRIPTION

[0034] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. 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.

[0035] The present invention provides an ultra-thin capacitor film stretching production line and a stretching method thereof through improvement. The technical solution of the present invention is:

[0036] Embodiment 1:

[0037] like Figures 1 to 8 As shown, an embodiment of the present invention provides an ultra-thin capacitor film stretching production line, including a shell 1, a plurality of stretching rollers 2 are rotatably arranged at one end of the inner side of the shell 1, the plurality of stretching rollers 2 are all electrically heated rollers, and the plurality of stretching rollers 2 are staggered, and a cooling fan 3 is arranged at the other end of the upper side of the shell 1, and an anti-shrinkage device is arranged at a position corresponding to the cooling fan 3 inside the shell 1; the anti-shrinkage device includes two long slide grooves 101 opened on both sides of the shell 1, and the inner sides of the two long slide grooves 101 are slidably connected with large sliders 102, and the two large An upper rod 103 is provided at the middle position of the upper side of the slider 102 through a first movable structure, and two lower rods 106 are movably provided at both ends of the two large sliders 102 through a second movable structure, and the outer sides of the two lower rods 106 and the upper rod 103 are rotatably connected with pulling rollers 107, and the two ends of the upper rod 103 are symmetrically rotatably connected with four push-pull rods 111, and one end of the four push-pull rods 111 is rotatably connected to the two ends of the two lower rods 106 respectively; a reciprocating drive mechanism is provided between the two large sliders 102 and the outer shell 1.

[0038] Furthermore, the first movable structure includes two top blocks 109 fixed at both ends of the outer side of the upper rod 103, and the lower ends of the two top blocks 109 are fixed with two vertical rods 108 respectively slidably inserted into the two large sliders 102, and the two top blocks 109 and the two large sliders 102 are elastically connected by springs 110;

[0039] The first movable structure is used to guide the upper rod 103 so that it can move vertically up and down, thereby driving a pulling roller 107 above to move up and down, thereby applying different pressures to the upper side of the capacitor film, thereby applying different tensile forces to the capacitor film, so that the capacitor film can better offset its own contraction force.

[0040] Furthermore, the second movable structure includes four short slide grooves 104 respectively provided at both ends of the two large slide blocks 102, the inner sides of the four short slide grooves 104 are all slidably connected with small slide blocks 105, and the two ends of the two lower rods 106 are respectively fixed to the corresponding two small slide blocks 105;

[0041] The second movable structure can guide the two lower rods 106 so that the lower rods 106 can move horizontally, thereby moving the two lower pulling rollers 107 horizontally, so that the two lower pulling rollers 107 cooperate with the upper pulling roller 107 to pull the capacitive film.

[0042] Further, the reciprocating drive mechanism includes two slide slot rods 205 fixed on one side of the two large sliders 102 and two wheel shafts 201 that are rotatably connected to the inside of the shell 1, two pulleys 202 are fixed at both ends of the two wheel shafts 201, the outer sides of the two pulleys 202 on the same side are connected by synchronous belts 203, one side of the two synchronous belts 203 is rotatably connected with rollers 204, one end of the two slide slot rods 205 is provided with roller grooves 206, and the two rollers 204 are respectively connected to the inner sides of the two roller grooves 206 in a rolling manner, and a rotating drive mechanism is arranged between one of the wheel shafts 201 and the shell 1, and the rotating drive mechanism includes a driven gear 207 fixed to one end of the outer side of the wheel shaft 201 and a driving motor 208 installed on the outer side of the shell 1, and a driving gear 209 meshing with the driven gear 207 is fixed to the driving end of the driving motor 208;

[0043] The reciprocating drive mechanism is used to drive the anti-shrinkage device to move back and forth, thereby pulling the capacitor film in the cooling section, so that the capacitor film can better offset its own shrinkage force and improve the shaping effect.

[0044] Furthermore, a roller lift adjustment mechanism is provided at a position of the housing 1 corresponding to the upper rod 103, and the roller lift adjustment mechanism includes a linkage shaft 301 that is rotatably connected to the housing 1 at a position above the pulling roller 107 and an adjustment motor 305 installed on the outer side of the housing 1, a worm 306 is fixed to the driving end of the adjustment motor 305, a worm wheel 304 that meshes with the worm 306 is fixed to one end of the linkage shaft 301, and two extension rods 302 are fixed to the outer ends of the linkage shaft 301 at positions on the inner side of the housing 1, and guide plates 303 are fixed to the lower ends of the two extension rods 302, and the lower side surfaces of the two guide plates 303 are in contact with the two ends of the upper rod 103 respectively;

[0045] Through the roller lift adjustment mechanism, when the anti-shrinkage device is located in different temperature sections of the capacitor film, different magnitudes of stretching forces can be applied to the capacitor film. When it is located at a high temperature of the capacitor film, the stretching force on the capacitor film can be increased, thereby fully offsetting the shrinkage force of the capacitor film in the high temperature section. When it is located at a low temperature of the capacitor film, the stretching force on the capacitor film can be reduced, thereby offsetting the smaller shrinkage force of the capacitor film in the low temperature section, thereby further improving the cooling and shaping effect of the capacitor film.

[0046] Furthermore, the housing 1 is provided with two traction mechanisms at one end of the cooling fan 3, the traction mechanisms comprising a traction motor 5 installed on the outside of the housing 1 and two traction rollers 4 rotatably connected to the inside of the housing 1, one end of each of the two traction rollers 4 is fixed with a traction roller gear 6 meshing with each other, and the driving end of the traction motor 5 is fixedly connected to one end of one of the traction rollers 4;

[0047] The traction mechanism is used to traction the capacitor film, so that the capacitor film passes through a plurality of stretching rollers 2 in sequence and is stretched in sequence.

[0048] Furthermore, two slots 8 are provided at one end of the housing 1 close to the stretching roller 2, and a winding roller 7 is provided at one end of the inner side of the housing 1 close to the stretching roller 2. The two ends of the winding roller 7 are rotatably connected to the inner sides of the two slots 8 through bearings, and two clamping blocks 9 for clamping the two ends of the winding roller 7 are fixed at one end of the two slots 8 by bolts.

[0049] The tightening block 9 can be fixed to the housing 1 at the position of the card slot 8 by bolts, so that the roller 7 can be fixed, and the roller 7 can be easily disassembled and replaced, so that the capacitor film raw material can be quickly installed inside the device.

[0050] Embodiment 2:

[0051] This embodiment also provides an ultra-thin capacitor film stretching method, which specifically includes the following steps:

[0052] Step 1, the traction motors 5 of the two traction mechanisms rotate at the same speed, the traction motors 5 drive the traction roller 4 to rotate, the traction roller 4 drives the other traction roller 4 to rotate in the opposite direction through the meshing of the two traction roller gears 6 at the end, the four traction rollers 4 of the two traction mechanisms simultaneously traction the capacitor film, so that the capacitor film passes through multiple stretching rollers 2 in sequence, and the stretching rollers 2 heat the capacitor film at the same time, so that the force between the internal molecular chain and the crystal surface of the plastic material in the capacitor film is reduced, and the capacitor film is longitudinally stretched and extended, and the stretched capacitor film passes under the cold air blower 3, and the cold air blower 3 generates cold air to cool the stretched capacitor film, so that the capacitor film is quickly shaped;

[0053] Step 2: Through the continuous reciprocating movement of the anti-shrinkage device, the two large sliders 102 of the anti-shrinkage device drive the two lower rods 106 and one upper rod 103 to move synchronously when moving back and forth, thereby driving the three pulling rollers 107 to move, and the vertical rod 108 of the first movable structure can guide the top block 109 to move up and down in the vertical direction, so that the upper rod 103 and a pulling roller 107 on its outer side move up and down vertically, and the upper pulling roller 107 is pressed on the upper side of the capacitor film, and the two lower pulling rollers 107 support the lower side of the capacitor film. Under the action of the three pulling rollers 107, a certain pulling force is applied to the capacitor film. At the same time, the three pulling rollers 107 reciprocate with the large slider 102, and continuously apply a certain pulling force to the capacitor film being cooled, so that the pulling force on the capacitor film and its own shrinkage force are offset;

[0054] Step 3: The worm 306 is driven to rotate by the regulating motor 305 of the roller lift regulating mechanism, and the worm 306 drives the worm wheel 304 to rotate, thereby driving the linkage shaft 301 to rotate. The linkage shaft 301 drives the two guide plates 303 to rotate through the two extension rods 302, and changes the inclination angle of the two guide plates 303, so that the ends of the two guide plates 303 close to the high temperature capacitor film rotate downward, and the ends close to the low temperature capacitor film rotate upward. When the anti-shrinkage device moves to the high temperature position close to the capacitor film, the upper rod 10 Under the guidance of the guide plate 303, the height is gradually lowered, and the upper rod 103 drives the two top blocks 109 to move downward. The two top blocks 109 respectively drive the vertical rod 108 at the lower end to move toward the inside of the large slider 102 and compress the spring 110. At the same time, the upper rod 103 drives the pulling roller 107 located above the outer side thereof to move vertically downward, reducing the height difference between the upper and lower pulling rollers 107, thereby increasing the pressure of the upper pulling roller 107 on the upper side of the capacitor film. When the upper rod 103 moves downward, it drives the four push-pull rods 110 at both ends. 1 is rotated horizontally, and the four push-pull rods 111 apply thrust to the two lower rods 106 respectively, thereby driving the two lower rods 106 and the four small sliders 105 to move to both sides along the short slide 104, increasing the distance between the two lower rods 106, and at the same time increasing the spacing between the two pulling rollers 107 below, so that the section of the capacitor film between the three pulling rollers 107 is bent with a larger arc, thereby increasing the pulling force applied to the capacitor film and the stretching degree of the capacitor film. The larger pulling force offsets the larger contraction force of the capacitor film. The temperature of the capacitor film decreases. When the anti-shrinkage device moves to a position close to the low temperature of the capacitor film, the end of the guide plate 303 close to the low temperature is higher. The upper rod 103 and a pulling roller 107 above are automatically raised under the elastic force of the spring 110, thereby reducing the height difference between the upper and lower pulling rollers 107, reducing the pressure of the upper pulling roller 107 on the capacitor film, and reducing the degree of bending of the upper pulling roller 107 on the capacitor film, thereby reducing the pulling force on the capacitor film, so that the pulling force on the capacitor film at the low temperature is closer to its shrinkage force.

[0055] Working principle: When in use, the two ends of the roll 7 wound with the capacitor film are inserted into the inner sides of the two slots 8, and then the two clamping blocks 9 are fixed to one end of the two slots 8 by bolts. The two clamping blocks 9 clamp the two ends of the roll 7 to the inner sides of the two slots 8, and then the capacitor film is rolled around the outer sides of multiple stretching rollers 2 in sequence, such as Figure 3As shown, finally, the capacitor film is made to pass through the gap between the traction rollers 4 of the two traction mechanisms and extend out from the other end of the housing 1. During operation, the traction motors 5 of the two traction mechanisms rotate at the same speed, and the traction motors 5 drive the traction rollers 4 to rotate. The traction rollers 4 drive the other traction rollers 4 to rotate in the opposite direction through the meshing of the two traction roller gears 6 at the end. The four traction rollers 4 of the two traction mechanisms can simultaneously traction the capacitor film, so that the capacitor film passes through a plurality of stretching rollers 2 in sequence. At the same time, the stretching rollers 2 heat the capacitor film, so that the force between the internal molecular chains and the crystal planes of the plastic material in the capacitor film is reduced, thereby facilitating the longitudinal stretching and extension of the capacitor film. The stretched capacitor film passes under the cooling fan 3, and the cooling fan 3 generates cold air to cool the stretched capacitor film, so that the capacitor film can be quickly shaped.

[0056] In order to prevent the stretched capacitor film from shrinking when it is cooled, while the cooling fan 3 cools the capacitor film, the driving motor 208 of the rotary drive mechanism drives the driving gear 209 to rotate, and the driving gear 209 drives the driven gear 207 to rotate through the meshing of teeth, and the driven gear 207 drives one of the wheel shafts 201 of the reciprocating drive mechanism to rotate, and this wheel shaft 201 drives the two pulleys 202 at both ends to rotate, and these two pulleys 202 drive two synchronous belts 203 and the other two pulleys 202 and another wheel shaft 201 to rotate synchronously, and when the two synchronous belts 203 rotate synchronously, the two rollers 204 can be driven to move synchronously along the contour line of the synchronous belts 203, and through the active cooperation between the rollers 204 and the roller grooves 206, the two rollers 204 can drive the two large sliders 102 of the anti-shrinkage device to reciprocate in the inner side of the long slide groove 101 through the two slide groove rods 205 for each movement of the two rollers.

[0057] When the two large sliders 102 of the anti-shrinkage device move back and forth, they can drive the two lower rods 106 and the one upper rod 103 to move synchronously, thereby driving the three pulling rollers 107 to move. The vertical rod 108 of the first movable structure can guide the top block 109 to move up and down in the vertical direction, so that the upper rod 103 and a pulling roller 107 on its outer side can move up and down vertically. The upper pulling roller 107 can be pressed on the upper side of the capacitor film, and the two lower pulling rollers 107 can support the lower side of the capacitor film. Therefore, under the action of the three pulling rollers 107, a certain pulling force can be applied to the capacitor film, such as Figure 8 As shown, the three pulling rollers 107 can move back and forth with the large slider 102, so a certain pulling force can be continuously applied to the capacitor film in the cooling process, which can effectively reduce the shrinkage of the capacitor film in the cooling process, improve the shaping effect of the capacitor film, and improve the processing quality of the capacitor film stretching;

[0058] As the capacitor film continues to move, the cooling fan 3 continues to cool the moving capacitor film. Therefore, the temperatures of the capacitor films at different positions below the cooling fan 3 are different. Therefore, the contraction strength of the capacitor films at different positions is also different. The capacitor film at a higher temperature has a greater contraction force, so the contraction amount is also greater. As the temperature gradually decreases, the contraction force of the capacitor film at a lower temperature is smaller, so the contraction amount is also smaller.

[0059] In order to further improve the shaping effect, the regulating motor 305 of the roller lift regulating mechanism is controlled to drive the worm 306 to rotate, and the worm 306 drives the worm wheel 304 to rotate, thereby driving the linkage shaft 301 to rotate, and the linkage shaft 301 drives the two guide plates 303 to rotate through the two extension rods 302, so that the inclination angle of the two guide plates 303 can be changed, so that the end of the two guide plates 303 close to the high temperature capacitor film rotates downward, and the end close to the low temperature capacitor film rotates upward, such as Figure 4 As shown, when the anti-shrinkage device moves to the high temperature position close to the capacitor film, the upper rod 103 is guided by the guide plate 303 and gradually lowers its height. The upper rod 103 drives the two top blocks 109 to move downward, and the two top blocks 109 respectively drive the vertical rod 108 at the lower end to move toward the inside of the large slider 102 and compress the spring 110. At the same time, the upper rod 103 drives the pulling roller 107 located above its outer side to move vertically downward, reducing the height difference between the upper and lower pulling rollers 107, thereby increasing the pressure of the upper pulling roller 107 on the upper side of the capacitor film. When the upper rod 103 moves downward, it drives the four push-pull rods 111 at both ends to rotate to a horizontal angle, and the four push-pull rods 111 apply thrust to the two lower rods 106 respectively, thereby driving the two lower rods 106 and the four small sliders 105 to move to both sides along the short slide 104, thereby increasing the distance between the two lower rods 106 and increasing the pressure at the same time. By increasing the distance between the two pulling rollers 107 at the bottom, a section of the capacitor film between the three pulling rollers 107 can be bent with a larger arc, thereby increasing the pulling force applied to the capacitor film, thereby increasing the degree of stretching of the capacitor film. The larger pulling force can offset the larger contraction force of the capacitor film. As the temperature of the capacitor film decreases, when the anti-contraction device moves to a position close to the low temperature of the capacitor film, the end of the guide plate 303 close to the low temperature is higher. Under the elastic force of the spring 110, the upper rod 103 and the upper pulling roller 107 can automatically increase their heights, thereby reducing the height difference between the upper and lower pulling rollers 107, reducing the pressure of the upper pulling roller 107 on the capacitor film, and reducing the degree of bending of the upper pulling roller 107 on the capacitor film, thereby reducing the pulling force on the capacitor film, making the pulling force on the capacitor film at the low temperature closer to its contraction force, thereby further improving the shaping effect of the capacitor film.

[0060] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An ultra-thin capacitive film stretching production line, comprising a housing (1), a plurality of stretching rollers (2) being rotatably arranged at one end of the inner side of the housing (1), and a cooling fan (3) being arranged at the other end of the upper side of the housing (1), characterized in that: An anti-shrinkage device is provided inside the shell (1) at a position corresponding to the cooling fan (3); The anti-shrinkage device comprises two long slide grooves (101) opened on both sides of the shell (1), the inner sides of the two long slide grooves (101) are slidably connected with large sliders (102), the upper sides of the two large sliders (102) are located at the middle position and are provided with an upper rod (103) through a first movable structure, and the two ends of the two large sliders (102) are movably provided with two lower rods (106) through a second movable structure, the outer sides of the two lower rods (106) and the upper rod (103) are rotatably connected with pulling rollers (107), and the two ends of the upper rod (103) are symmetrically rotatably connected with four push-pull rods (111), and one end of the four push-pull rods (111) is respectively rotatably connected to the two ends of the two lower rods (106); A reciprocating drive mechanism is provided between the two large sliders (102) and the housing (1); A roller lift adjustment mechanism is provided at a position of the housing (1) corresponding to the upper rod (103), and the roller lift adjustment mechanism comprises a linkage shaft (301) which is rotatably connected to the housing (1) and located above the pulling roller (107), and an adjustment motor (305) which is installed on the outside of the housing (1), a worm (306) being fixed to the driving end of the adjustment motor (305), a worm wheel (304) meshing with the worm (306) being fixed to one end of the linkage shaft (301), and two extension rods (302) being fixed to the outer ends of the linkage shaft (301) at positions on the inner side of the housing (1), guide plates (303) being fixed to the lower ends of the two extension rods (302), and the two guide plates (303) being fixed to the lower ends of the two extension rods (302). 3) are in contact with the two ends of the upper rod (103), the first movable structure comprises two top blocks (109) fixed at the two ends of the outer side of the upper rod (103), the lower ends of the two top blocks (109) are fixed with two vertical rods (108) which are slidably inserted into the two large sliders (102), and the two top blocks (109) and the two large sliders (102) are elastically connected by springs (110), the second movable structure comprises four short sliding grooves (104) respectively opened at the two ends of the two large sliders (102), the inner sides of the four short sliding grooves (104) are slidably connected with small sliders (105), and the two ends of the two lower rods (106) are respectively fixed to the corresponding two small sliders (105).

2. The ultra-thin capacitor film stretching production line according to claim 1, characterized in that: The reciprocating drive mechanism comprises two slide slot rods (205) fixed on one side of the two large sliders (102) and two wheel shafts (201) rotatably connected to the inside of the housing (1); two pulleys (202) are fixed at both ends of the two wheel shafts (201); the outer sides of the two pulleys (202) located on the same side are connected by transmission via synchronous belts (203); one side of the two synchronous belts (203) is rotatably connected to rollers (204); one end of the two slide slot rods (205) is provided with roller grooves (206); the two rollers (204) are respectively connected to the inner sides of the two roller grooves (206) in a rolling manner; and a rotating drive mechanism is provided between one of the wheel shafts (201) and the housing (1).

3. The ultra-thin capacitor film stretching production line according to claim 2, characterized in that: The rotary drive mechanism comprises a driven gear (207) fixed to one end outside the wheel shaft (201) and a drive motor (208) mounted on the outside of the housing (1); a driving gear (209) meshing with the driven gear (207) is fixed to the driving end of the drive motor (208).

4. The ultra-thin capacitor film stretching production line according to claim 1, characterized in that: The housing (1) is provided with two traction mechanisms at one end of the cooling fan (3), the traction mechanisms comprising a traction motor (5) mounted on the outside of the housing (1) and two traction rollers (4) rotatably connected to the inside of the housing (1), one end of each of the two traction rollers (4) being fixed with mutually meshing traction roller gears (6), and the driving end of the traction motor (5) being fixedly connected to one end of one of the traction rollers (4).

5. The ultra-thin capacitor film stretching production line according to claim 1, characterized in that: Two slots (8) are provided at one end of the shell (1) close to the stretching roller (2), and a winding roller (7) is provided at one end of the inner side of the shell (1) close to the stretching roller (2). The two ends of the winding roller (7) are rotatably connected to the inner sides of the two slots (8) via bearings, and two clamping blocks (9) for clamping the two ends of the winding roller (7) are fixed at one end of the two slots (8) via bolts.

6. The ultra-thin capacitor film stretching production line according to claim 1, characterized in that: The plurality of stretching rollers (2) are all electrically heated rollers, and the plurality of stretching rollers (2) are arranged in a staggered manner.

7. A method for stretching an ultra-thin capacitor film, comprising the ultra-thin capacitor film stretching production line according to claim 4, characterized in that: Step 1: The traction motors (5) of the two traction mechanisms rotate at the same speed, and each traction motor (5) drives the corresponding two traction rollers (4) to rotate in the opposite direction. The four traction rollers (4) of the two traction mechanisms simultaneously pull the capacitor film, so that the capacitor film passes through a plurality of stretching rollers (2) in sequence. At the same time, the stretching rollers (2) heat the capacitor film, so that the interaction force between the internal molecular chains and the crystal planes of the plastic material in the capacitor film is reduced, and the capacitor film is longitudinally stretched and extended; Step 2: Through the continuous reciprocating movement of the anti-shrinkage device, the two large sliders (102) of the anti-shrinkage device drive the two lower rods (106) and the upper rod (103) to move synchronously when moving back and forth, thereby driving the three pulling rollers (107) to move. Under the action of the three pulling rollers (107), a certain pulling force is applied to the capacitor film. At the same time, the three pulling rollers (107) move back and forth with the large slider (102), continuously applying a certain pulling force to the capacitor film being cooled, so that the pulling force on the capacitor film and its own shrinkage force are offset; Step 3: By controlling the roller lift adjustment mechanism, the inclination angle of two guide plates (303) can be adjusted, so that the ends of the two guide plates (303) close to the capacitor film at the high temperature are rotated downward, and the ends of the two guide plates (303) close to the capacitor film at the low temperature are rotated upward. When the anti-shrinkage device moves to the high temperature of the capacitor film, the height difference between the upper and lower pulling rollers (107) is reduced, thereby increasing the pressure of the upper pulling roller (107) on the upper side of the capacitor film, so that the section of the capacitor film located between the three pulling rollers (107) is bent with a larger arc, thereby improving the pressure on the capacitor film. The added tension increases the stretching degree of the capacitor film. As the temperature of the capacitor film decreases, when the anti-contraction device moves to a position close to the low temperature of the capacitor film, the height of the end of the guide plate (303) close to the low temperature is higher. The upper rod (103) and a pulling roller (107) above are automatically raised under the elastic force of the spring (110), thereby reducing the height difference between the upper and lower pulling rollers (107), reducing the pressure of the upper pulling roller (107) on the capacitor film, reducing the bending degree of the upper pulling roller (107) on the capacitor film, and thus reducing the tension on the capacitor film.

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