High-toughness polyester film preparation device and preparation method thereof

Abstract

The invention discloses a high-toughness polyester film preparation device and a preparation method thereof, and relates to the technical field of polyester film preparation. The high-toughness polyester film preparation device comprises a flotation mechanism with a one-way opening in the top end, and the flotation mechanism is filled with flotation liquid; the problems that an existing flotation mechanism cannot achieve linkage adjustment of structures such as self-adaptive flotation liquid in a flotation tank according to the magnitude of actually supplied polyester chips, liquid in the flotation tank overflows when too many polyester chip mixed impurities enter the flotation tank in a short time, and the flotation effect is affected are solved. The chip supply quantity level and the equipment working intensity are indirectly reflected according to the working high temperature of the belt wheel assembly and the belt assembly, and the liquid supply pump or the liquid discharge valve is triggered to be opened in a self-adaptive mode, so that the situation that the flotation effect is affected by flotation liquid overflow or too low liquid level due to short-time entry of too many polyester chips is avoided; the self-adaptive adjusting capacity of the flotation mechanism is effectively improved, and the stability of the flotation effect is guaranteed.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of polyester film preparation, in particular to a high-toughness polyester film preparation device and a preparation method thereof. BACKGROUND

[0002] High-toughness polyester film is widely used in high-end fields such as packaging, electronics and photovoltaics due to its excellent mechanical properties, chemical corrosion resistance and good optical properties. In the preparation process of high-toughness polyester film, the purity of the raw material is one of the key factors that determine the toughness, strength and other key properties of the film. At present, the raw material for preparing polyester film is mainly polyester chips, which are derived from new materials and recycled materials. However, recycled materials often contain metal and non-metal impurities. If these impurities are not effectively removed, they will form defect points during film forming, resulting in decreased toughness and easy breakage of the film, which seriously affects the product qualification rate and service life.

[0003] In the prior art, for example, Chinese Patent Publication No. CN118514241A discloses a raw material recycling equipment in polyester film production, which comprises a machine body, a large particle box is placed outside the machine body, a small particle box is slidably installed outside the machine body, and a stirring and separating assembly, a protection assembly, a shaking assembly and a triggering assembly are arranged outside the small particle box. In order to separate the particles by size while stirring, the stirring and separating assembly is provided. By starting the large motor, the stirring wheel inside the stirring bin starts to rotate, the material entering from the hopper is stirred, and the stirred material falls into the guide plate and is guided onto the conveying belt. At the same time, the conveying belt produces slight shaking during transmission, the smaller material flows out from the filter hole and falls into the small particle box, and the larger material is conveyed by the conveying belt to the discharge plate and falls into the large particle box.

[0004] In the prior art, during the existing polyester chip sorting process, impurities may adhere to the inside of the chip due to storage and other problems. The existing flotation mechanism cannot realize linkage adjustment of the internal flotation liquid structure of the flotation tank according to the actual supply level of the polyester chip, so that when too much polyester chip mixed with impurities enters the internal flotation tank in a short time, it may cause the liquid in the internal flotation tank to overflow, affecting the flotation effect.

[0005] Therefore, we propose a high-toughness polyester film preparation device and a preparation method thereof to solve the problems raised in the background art. SUMMARY

[0006] The purpose of this invention is to provide a high-toughness polyester film preparation device and method to solve the problem mentioned in the background art that, in the existing polyester chip sorting process, impurities may adhere to the inside of the chips due to storage and other issues. The existing flotation mechanism cannot achieve adaptive linkage adjustment of the flotation liquid and other structures inside the flotation cell according to the actual supply of polyester chips. For example, when too many polyester chips mixed with impurities enter the flotation cell in a short period of time, the liquid inside the flotation cell will overflow, affecting the flotation effect.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a high-toughness polyester film preparation apparatus and preparation method thereof, comprising: a flotation mechanism with a unidirectional opening at the top, wherein the interior of the flotation mechanism is filled with flotation liquid, and a flotation shaft is rotatably connected inside the top opening of the flotation mechanism, and a flotation plate with a hollow structure is fixedly connected to the outside of the flotation shaft;

[0008] The inner side of the flotation mechanism has two support structures fixedly connected in a linear array. A hopper assembly is fixedly connected to the top of each support structure. A hollow feed tube assembly is fixedly connected to the bottom surface of the hopper assembly. A feed motor is mounted on the front surface of the flotation mechanism. A feed valve plate is mounted on the rear output shaft of the feed motor. The feed valve plate is rotatably connected to the inner side of the feed tube assembly, and the output shaft of the feed valve plate extends rearward out of the flotation mechanism. Pulley assemblies are coaxially mounted on the rear sides of both the output shaft and the flotation shaft. Belt assemblies are also mounted on the outer sides of the two pulley assemblies. A cover is mounted on the rear side of the flotation mechanism via a fixing bolt passing through the mounting plate. The body mechanism has a heat dissipation slot on the right side and a cooling motor fixedly connected to the rear side. A fan blade assembly is installed on the front output shaft of the cooling motor. A sleeve assembly is fixedly connected to the bottom of the outer circumference of the body mechanism. The sleeve assembly is connected to the body mechanism and has heat dissipation holes arranged in a ring on the outer circumference of the sleeve assembly. The inner wall of the sleeve assembly has internal threads and is screwed with a connecting mechanism. A transmission guide rod with two protruding points is fixedly connected to the center of the connecting mechanism. The transmission guide rod is used to transmit the high temperature of the pulley assembly and belt assembly during operation. A tube sleeve assembly is fixedly connected to the bottom surface of the connecting mechanism.

[0009] Preferably, a controller is fixedly connected to the rear end face of the flotation mechanism. The controller is a PLC control structure, and a floating piston plate is installed inside the tube sleeve assembly. A temperature-sensitive expansion gas is provided in the space between the floating piston plate and the tube sleeve assembly. A guide rod assembly is fixedly connected to the bottom end face of the floating piston plate.

[0010] Preferably, the guide rod assembly is a cylindrical structure, and a sleeve assembly extends downward from the guide rod assembly. A contact plate is fixedly connected to the bottom end of the guide rod assembly, and a hollow mounting bracket is fixedly connected to the bottom end of the sleeve assembly. Contact switch A and contact switch B are fixedly connected to the top and bottom end of the mounting bracket, respectively. A connecting wire harness is integrated at the bottom end of the mounting bracket for electrical connection with the controller.

[0011] Preferably, a drain pipe is fixedly connected to the left end of the flotation mechanism, and a drain valve is provided on the outside of the drain pipe. The drain valve is electrically connected to the contact switch B through the controller. When the contact plate is in a state of being close to and abutting the contact switch B, the drain valve is in an open state and the timing stops working. A liquid level switch is also fixedly connected to the inclined surface at the top of the flotation mechanism, and the liquid level switch is electrically connected to the controller.

[0012] Preferably, two guide rollers are installed in a linear array on the inner side of the two side plate assemblies, and a conveyor motor is installed on the outer side of the side plate assemblies. The rear output shaft of the conveyor motor is connected to the guide rollers. A conveyor belt is also installed on the outer side of the two guide rollers. The conveyor belt and the guide rollers together form a feeding structure. A guide rail mechanism is fixedly connected to the inner side of the flotation mechanism. The guide rail mechanism is arranged vertically.

[0013] Preferably, a mounting base plate is fixedly connected to the rear side of the flotation mechanism, and a liquid supply pipe is fixedly connected to the inner side of the mounting base plate. The liquid supply pipe is used to supply liquid to the interior of the flotation mechanism, and a liquid supply pump is also installed on the outer side of the liquid supply pipe. The liquid supply pump is electrically connected to a contact switch A and a liquid level switch through a controller. When the contact plate is in contact with the contact switch A and the liquid level switch is in the closed state, the liquid supply pump is in the open state. When the liquid level switch is in the liquid-contact open state, the liquid supply pump is in the closed state.

[0014] Preferably, a discharge bracket is fixedly connected to the right side of the flotation mechanism. The discharge bracket is connected to the flotation mechanism, and an inclined screen plate assembly is fixedly connected to the top of the discharge bracket. A side plate assembly is fixedly connected to the side of the discharge bracket away from the flotation mechanism. There are two side plate assemblies, and the two side plate assemblies are fixedly connected to the front and rear sides of the right end face of the discharge bracket in opposite directions.

[0015] Preferably, there are two guide rail mechanisms, which are fixedly connected to the front and rear sides of the flotation mechanism in opposite directions. Both guide rail mechanisms have longitudinal grooves inside, and longitudinally arranged traction push rods are fixedly connected inside the longitudinal grooves. Movable support arms are fixedly connected to the bottom ends of the two traction push rods.

[0016] Preferably, there are two movable support arms, and a flow-gathering mechanism is fixedly connected to the inner side of each movable support arm. The flow-gathering mechanism is a frustoconical structure with a thicker upper part and a thinner lower part. The flow-gathering mechanism has a filter assembly for discharging liquid inside. An electromagnetic guide plate is fixedly connected in a ring array on the inner bottom surface of the flow-gathering mechanism. The electromagnetic guide plate is used to adsorb metal materials in the waste. A disc-shaped support guide plate is fixedly connected to the inner bottom surface of the flow-gathering mechanism. The support guide plate is connected to the flow-gathering mechanism through a guide post. A sleeve assembly is fixedly connected to the top surface of the support guide plate. A top plate assembly is fixedly connected to the top surface of the sleeve assembly. A mixed-flow motor is installed on the top surface of the top plate assembly. An output shaft is provided at the bottom of the mixed-flow motor. The support guide plate extends downward from the output shaft. Mixed-flow blades are fixedly connected in a ring array on the outer circumference of the output shaft.

[0017] This invention discloses a high-toughness polyester film preparation apparatus, comprising the following steps:

[0018] S1: Start the feeding motor at the front end of the flotation mechanism. The output shaft of the feeding motor drives the feeding valve plate inside the feed tube assembly to rotate. The polyester chips in the hopper assembly rotate with the feeding valve plate and are quantitatively fed into the flotation mechanism through the feed tube assembly.

[0019] S2: The feed motor output axial flotation mechanism rear extension and the flotation shaft rear side are both equipped with pulley assemblies. The outer side of the two pulley assemblies is fitted with belt assemblies. When the feed motor is working, it drives the flotation shaft to rotate through the pulley assembly and belt assembly. The hollow flotation plate on the outer side of the flotation shaft rotates synchronously to agitate and float the polyester chips in the flotation liquid in the flotation mechanism.

[0020] S3: The pulley assembly and belt assembly drive generate high temperature. The transmission guide rod of the connecting mechanism in the rear cover mechanism of the flotation mechanism transmits the high temperature to the tube sleeve assembly. The temperature-sensitive expansion gas between the floating piston plate and the tube sleeve assembly in the tube sleeve assembly expands due to heat, pushing the floating piston plate down and causing the guide rod assembly and the bottom contact plate to move down.

[0021] S4: When the pulley assembly and belt assembly reach the high temperature threshold, the contact plate moves down to trigger contact switch B. Contact switch B transmits the signal to the controller through the connecting wire harness. The controller starts the cooling motor on the back of the cover mechanism. The cooling motor drives the fan blade assembly to rotate. Cold air enters through the through slot on the right side of the cover mechanism, and hot air is discharged through the heat dissipation holes of the sleeve assembly, thereby cooling the transmission components.

[0022] S5: After the controller receives the signal from contact switch A, if the level switch is in the closed state and the flotation liquid level has not reached the trigger height, the controller starts the supply pump, and the external flotation liquid is transported to the flotation mechanism through the supply pipe to replenish the flotation liquid;

[0023] S6: When the flotation liquid level rises to the level switch, the level switch will send an open signal to the controller, and the controller will shut down the supply pump to stop the supply of liquid; if the contact plate triggers the contact switch B, the controller will open the drain valve on the drain pipe to discharge the excess flotation liquid, and at the same time the controller will start a timer. After the liquid level drops to the normal range, the drain valve will be closed.

[0024] S7: The controller starts the traction push rod in the guide rail mechanism. The traction push rod drives the moving support arm to move down along the longitudinal groove of the guide rail mechanism. The moving support arm drives the flow-gathering mechanism to move down to the impurity area at the bottom of the flotation mechanism. The flow-gathering mechanism gathers the impurities, and the flotation liquid is discharged through the filter assembly, while the impurities are retained. In order to separate the metal material, the controller controls the electromagnetic guide plate to be energized to adsorb the metal material in the impurities.

[0025] S8: The controller starts the mixed flow motor above the support guide plate. The output shaft of the mixed flow motor drives the mixed flow blades to rotate, stirring the flotation liquid around the flow-gathering mechanism to prevent impurities from settling.

[0026] S9: After flotation, the polyester chips enter the discharge support under the push of the flotation plate. After being screened by the screen plate assembly, the residual fine impurities are intercepted, and the pure chips fall into the conveyor belt. The controller starts the conveyor motor on the outside of the side plate assembly. The conveyor motor drives the guide roller to rotate, and the conveyor belt transports the chips to the next process.

[0027] S10: After the impurities are collected, the controller controls the traction push rod to retract, driving the flow-gathering mechanism to move upward and reset; the power supply of the electromagnetic guide plate is turned off, the metal material is recovered, and the impurities in the flow-gathering mechanism are cleaned.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. When in use, this invention, through the linkage of the transmission guide rod, temperature-sensing expansion gas, floating piston plate, contact switch A, contact switch B and controller, achieves adaptive triggering of the liquid supply pump or the drain valve based on the working temperature of the pulley assembly and belt assembly, indirectly reflecting the level of chip supply and the working intensity of the equipment. This avoids the situation where too many polyester chips enter in a short time, causing the flotation liquid to overflow or the liquid level to be too low, affecting the flotation effect. It effectively improves the adaptive adjustment capability of the flotation mechanism, ensures the stability of the flotation effect, and solves the technical problem of the difficulty in adaptively controlling the flotation liquid level in the prior art.

[0030] 2. In use, this invention achieves impurity collection through the filter assembly of the current-gathering mechanism, and the electromagnetic guide plate adsorbs metal materials, thus separating impurities from metal materials and improving the thoroughness and purity of impurity collection. At the same time, the guide rail mechanism and traction push rod are used to adjust the position of the current-gathering mechanism to ensure the collection of impurities at different depths. Combined with the mixing of the flow blades to prevent impurity deposition, the impurity collection effect is further improved. In addition, the sieve plate assembly pre-screens residual impurities in the slices, and the conveyor belt efficiently transports the slices, solving the problems of incomplete impurity collection and low slice transport efficiency in the prior art. This provides purer raw materials for the subsequent preparation of high-toughness polyester films and ensures the quality of the films produced.

[0031] 3. When this invention is used, the heat dissipation system, composed of the cover mechanism, the heat dissipation motor, the fan blade assembly, and the heat dissipation holes of the sleeve assembly, can dissipate heat in a timely manner when the pulley assembly and belt assembly generate high temperatures, thereby reducing the operating temperature of the components and extending the service life of the equipment. At the same time, the transmission guide rod transmits the high temperature to the sleeve assembly, triggering the subsequent liquid level adjustment linkage mechanism, realizing the combination of high temperature utilization and heat dissipation protection, improving the overall stability and reliability of the equipment, and solving the problem in the prior art that high temperature affects the service life of the equipment and lacks an effective heat dissipation and high temperature utilization mechanism. Attached Figure Description

[0032] Figure 1 This is a front perspective view of a high-toughness polyester film preparation apparatus and preparation method of the present invention.

[0033] Figure 2 This is a rear perspective view of a high-toughness polyester film preparation apparatus and preparation method of the present invention.

[0034] Figure 3 This is a perspective view of the cover mechanism and mounting plate assembly of a high-toughness polyester film preparation device and preparation method of the present invention.

[0035] Figure 4 This is a top perspective view of a high-toughness polyester film preparation apparatus and preparation method of the present invention;

[0036] Figure 5 This is a perspective view of the cover mechanism and mounting plate assembly of a high-toughness polyester film preparation device and preparation method of the present invention.

[0037] Figure 6 This is a perspective view of the connection mechanism and transmission guide rod assembly of a high-toughness polyester film preparation device and preparation method according to the present invention.

[0038] Figure 7 This is a front perspective view of a high-toughness polyester film preparation apparatus and preparation method of the present invention.

[0039] Figure 8This invention relates to a high-toughness polyester film preparation apparatus and method. Figure 4 Enlarged 3D view at point A in the middle;

[0040] In the diagram: 1. Flotation mechanism; 101. Drain pipe; 1011. Drain valve; 1012. Level switch; 1013. Controller; 2. Support mechanism; 201. Hopper assembly; 2011. Feed pipe assembly; 2012. Feeding motor; 2013. Feeding valve plate; 2014. Pulley assembly; 2015. Belt assembly; 2016. Flotation shaft; 2017. Flotation plate; 3. Discharge support; 301. Screen plate assembly; 3011. Side plate assembly; 3012. Conveyor motor; 3013. Conveyor belt; 4. Mounting base plate; 401. Supply pipe; 4011. Supply pump; 5. Guide rail mechanism; 501. Traction push rod; 5011. Moving support arm; 5012 6. Connecting slider; 7. Converging mechanism; 8. Filter assembly; 9. Electromagnetic guide plate; 10. Support guide plate; 11. Conduit assembly; 12. Top plate assembly; 23. Mixing motor; 24. Mixing blade; 35. Cover mechanism; 46. Mounting plate; 57. Cooling motor; 68. Fan blade assembly; 79. Sleeve assembly; 8014. Heat dissipation hole; 901. Connecting mechanism; 10. Transfer guide rod; 11. Sleeve assembly; 12. Floating piston plate; 13. Guide rod assembly; 14. Mounting bracket; 15. Contact plate; 16. Contact switch A; 17. Contact switch B; 18. Connecting wire harness. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Example 1

[0043] Please see Figures 1-8 As shown, the present invention provides a technical solution: a high-toughness polyester film preparation device and preparation method thereof, including a flotation mechanism 1 with a one-way opening at the top, the interior of the flotation mechanism 1 being filled with flotation liquid, and a flotation shaft 2016 being rotatably connected inside the top opening of the flotation mechanism 1, and a flotation plate 2017 with a hollow structure being fixedly connected to the outside of the flotation shaft 2016.

[0044] Two support mechanisms 2 are fixedly connected in a linear array on the inner side of the flotation mechanism 1. A hopper assembly 201 is fixedly connected to the top of each support mechanism 2. A hollow feed tube assembly 2011 is fixedly connected to the bottom surface of the hopper assembly 201. A feed motor 2012 is mounted on the front surface of the flotation mechanism 1. A feed valve plate 2013 is mounted on the rear output shaft of the feed motor 2012. The feed valve plate 2013 is rotatably connected to the inner side of the feed tube assembly 2011, and the output shaft of the feed valve plate 2013 extends rearward out of the flotation mechanism 1. A pulley assembly 2014 is coaxially mounted on the rear side of both the output shaft and the flotation shaft 2016. A belt assembly 2015 is also installed on the outside of component 2014. A cover mechanism 8 is installed on the rear side of flotation mechanism 1 through mounting plate 801 via a fixing bolt. A through slot for heat dissipation is opened on the right side of cover mechanism 8, and a heat dissipation motor 8011 is fixedly connected to the rear side of cover mechanism 8. A fan blade assembly 8012 is installed on the front output shaft of heat dissipation motor 8011. A sleeve assembly 8013 is fixedly connected to the bottom of the outer peripheral surface of cover mechanism 8. The sleeve assembly 8013 is in communication with cover mechanism 8, and heat dissipation holes 8014 are opened in a ring array on the outer peripheral surface of sleeve assembly 8013. An internal thread is opened on the inner wall of sleeve assembly 8013, and a connecting mechanism is screwed on it. 9. A transmission guide rod 901 with two protruding points is fixedly connected to the center of the connecting mechanism 9. The transmission guide rod 901 is used to transmit the high temperature of the pulley assembly 2014 and belt assembly 2015 during operation. A sleeve assembly 9011 is fixedly connected to the bottom end face of the connecting mechanism 9. A controller 1013 is fixedly connected to the rear end face of the flotation mechanism 1. The controller 1013 is a PLC control structure. A floating piston plate 9012 is installed inside the sleeve assembly 9011. A temperature-sensing expansion gas is installed in the space between the floating piston plate 9012 and the sleeve assembly 9011. A guide rod assembly 9013 is fixedly connected to the bottom end face of the floating piston plate 9012. The guide rod assembly 9013 has a cylindrical structure, and a sleeve assembly 9011 extends downward from the guide rod assembly 9013. A contact plate 9015 is fixedly connected to the bottom end of the guide rod assembly 9013, and a hollow mounting bracket 9014 is fixedly connected to the bottom end of the sleeve assembly 9011. A contact switch A9016 and a contact switch B9017 are fixedly connected to the top and bottom ends of the mounting bracket 9014, respectively. A connecting wire harness 9018 is integrated at the bottom end of the mounting bracket 9014. The connecting wire harness 9018 is used to electrically connect to the controller 1013. Two connecting sliders 5012 are fixedly connected to the outer side of the movable support arm 5011 in opposite directions.

[0045] This invention discloses a high-toughness polyester film preparation apparatus, comprising the following steps:

[0046] S1: Start the feeding motor 2012 at the front end of the flotation mechanism 1. The output shaft of the feeding motor 2012 drives the feeding valve plate 2013 inside the feed tube assembly 2011 to rotate. The polyester chips in the hopper assembly 201 rotate with the feeding valve plate 2013 and are quantitatively fed into the flotation mechanism 1 through the feed tube assembly 2011.

[0047] S2: The feed motor 2012 outputs an axial extension of the flotation mechanism 1 and the rear side of the flotation shaft 2016, both of which are equipped with pulley assemblies 2014. Belt assemblies 2015 are fitted on the outer sides of the two pulley assemblies 2014. When the feed motor 2012 is working, it drives the flotation shaft 2016 to rotate through the pulley assembly 2014 and the belt assembly 2015. The hollow flotation plate 2017 on the outer side of the flotation shaft 2016 rotates synchronously, agitating and flotating the polyester chips in the flotation liquid inside the flotation mechanism 1.

[0048] S3: The high temperature generated by the transmission between the pulley assembly 2014 and the belt assembly 2015 is transmitted to the tube sleeve assembly 901 by the transmission guide rod 901 of the connecting mechanism 9 in the rear cover mechanism 8 of the flotation mechanism 1. The temperature-sensitive expansion gas between the floating piston plate 9012 and the tube sleeve assembly 9011 is heated and expands, pushing the floating piston plate 9012 to move down, which in turn drives the guide rod assembly 9013 and the bottom contact plate 9015 to move down.

[0049] S4: When the pulley assembly 2014 and belt assembly 2015 reach the high temperature threshold, the contact plate 9015 moves down to trigger the contact switch B9017. The contact switch B9017 transmits the signal to the controller 1013 through the connecting wire harness 9018. The controller 1013 starts the heat dissipation motor 8011 on the rear side of the cover mechanism 8. The heat dissipation motor 8011 drives the fan blade assembly 8012 to rotate. Cold air enters through the right through slot of the cover mechanism 8, and hot air is discharged through the heat dissipation hole 8014 of the sleeve assembly 8013, thereby cooling the transmission components.

[0050] S5: After receiving the signal from the contact switch A9016, if the level switch 1012 is in the closed state and the flotation liquid level has not reached the trigger height, the controller 1013 starts the supply pump 4011, and the external flotation liquid is transported to the flotation mechanism 1 through the supply pipe 401 to replenish the flotation liquid.

[0051] S6: When the flotation liquid level rises to trigger the level switch 1012, the level switch 1012 will transmit an open signal to the controller 1013, and the controller 1013 will shut down the supply pump 4011 to stop the supply of liquid; if the contact plate 9015 triggers the contact switch B9017, the controller 1013 will open the drain valve 1011 on the drain pipe 101 to drain excess flotation liquid, and at the same time the controller 1013 will time it, and close the drain valve 1011 after the liquid level drops to the normal range.

[0052] S7: Controller 1013 starts the traction push rod 501 in the guide rail mechanism 5. The traction push rod 501 drives the moving support arm 5011 to move down along the longitudinal groove of the guide rail mechanism 5. The moving support arm 5011 drives the flow-gathering mechanism 6 to move down to the impurity area at the bottom of the flotation mechanism 1. The flow-gathering mechanism 6 gathers the impurities. The flotation liquid is discharged through the filter assembly 601, and the impurities are retained. In order to separate the metal material, controller 1013 controls the electromagnetic guide plate 6011 to be energized to adsorb the metal material in the impurities.

[0053] S8: Controller 1013 starts the mixed flow motor 7012 above the support guide plate 7. The output shaft of the mixed flow motor 7012 drives the mixed flow blade 7013 to rotate, stirring the flotation liquid around the flow gathering mechanism 6 to prevent impurities from settling.

[0054] S9: The polyester chips after flotation are pushed into the discharge bracket 3 by the flotation plate 2017. After being screened by the screen plate assembly 301, the residual fine impurities are intercepted and the pure chips fall into the conveyor belt 3013. The controller 1013 starts the conveyor motor 3012 on the outside of the side plate assembly 3011. The conveyor motor 3012 drives the guide roller to rotate and the conveyor belt 3013 transports the chips to the next process.

[0055] S10: After the impurities are collected, the controller 1013 controls the traction push rod 501 to retract, driving the flow-gathering mechanism 6 to move upward and reset; the power supply of the electromagnetic guide plate 6011 is turned off, the metal material is recovered, and the impurities in the flow-gathering mechanism 6 are cleaned.

[0056] In this embodiment, when the device enters the normal working process, the feeding motor 2012 installed on the front end of the flotation mechanism 1 is first started. The rear output shaft of the feeding motor 2012 directly drives the feeding valve plate 2013 connected to it, so that the feeding valve plate 2013 rotates inside the feed tube assembly 2011. The feed tube assembly 2011 has an internal hollow structure and its top end is fixedly connected to the hopper assembly 201. The hopper assembly 201 is stably supported by two support mechanisms 2 fixed in a linear array inside the flotation mechanism 1. At this time, the polyester chips stored in the hopper assembly 201 will be quantitatively transported to the inside of the flotation mechanism 1 through the feed tube assembly 2011 as the feeding valve plate 2013 rotates, providing raw materials for subsequent flotation operations.

[0057] While the feeding motor 2012 is working, the part of its output shaft extending to the rear side of the flotation mechanism 1 is coaxially mounted with the rear side of the flotation shaft 2016 with pulley assemblies 2014. The outer sides of the two pulley assemblies 2014 are fitted with belt assemblies 2015, forming a complete transmission structure. When the output shaft of the feeding motor 2012 rotates, the flotation shaft 2016 will be driven to rotate synchronously through the transmission action of the pulley assemblies 2014 and belt assemblies 2015. When the flotation shaft 2016 rotates, the hollow structure flotation plate 2017 fixedly connected to its outer side will also rotate. The flotation mechanism 1 is pre-filled with flotation liquid. The rotating flotation plate 2017 will agitate and float the polyester chips that have entered the flotation liquid. By utilizing the difference in buoyancy between the polyester chips and impurities in the flotation liquid, the chips and impurities are initially separated.

[0058] As the pulley assembly 2014 and belt assembly 2015 continue to drive, the friction between them will continuously generate high temperatures. If the high temperature accumulates for a long time, it will not only affect the service life of the transmission components, but may also lead to a decrease in transmission efficiency. To solve this problem, a cover mechanism 8 is installed on the rear side of the flotation mechanism 1 through the mounting plate 801 via a fixing bolt. The cover mechanism 8 protects the pulley assembly 2014 and belt assembly 2015 inside, forming a relatively closed space. At the same time, the connecting mechanism 9 installed inside the cover mechanism 8 has two protruding transmission guide rods 901 fixedly connected at the center. One end of the transmission guide rod 901 is close to the pulley assembly 2014 and belt assembly 2015, which can efficiently transfer the high temperature generated by the two to the tube sleeve assembly 9011 fixedly connected at the bottom of the connecting mechanism 9.

[0059] A floating piston plate 9012 is installed inside the sleeve assembly 9011. The floating piston plate 9012 is tightly fitted to the inner wall of the sleeve assembly 9011, and the space between them is filled with temperature-sensitive expansion gas. When there are few polyester chips stored in the hopper assembly 201, the feeding motor 2012 can drive the feeding valve plate 2013 at a slower speed. At this time, the transmission speed of the pulley assembly 2014 and belt assembly 2015 installed behind the feeding valve plate 2013 will also be reduced accordingly. The working temperature can be quickly discharged without subsequent linkage. However, when there are many polyester chips inside the hopper assembly 201, the feeding motor 2012 will drive the feeding valve plate 2013 at a higher speed. At this time, the friction speed of the pulley assembly 2014 and belt assembly 2015 will increase, and the temperature will rise rapidly. High-temperature gas will continuously blow towards the transfer guide rod 901. Therefore, the transfer guide rod 901 will use the thermal conductivity of metal to conduct heat downwards. When the transfer guide rod 901 transfers the high temperature to the sleeve assembly 9011, the temperature-sensitive expansion gas (such as helium in an inert gas) in the sleeve assembly 9011 will expand rapidly due to the heat, generating an outward thrust, which will push the floating piston plate 9012 to move downwards along the inner wall of the sleeve assembly 9011. The bottom end of the floating piston plate 9012 is fixedly connected to the guide rod assembly 9013. The guide rod assembly 9013 has a cylindrical structure and extends downwards out of the sleeve assembly 9011. Therefore, when the floating piston plate 9012 moves downwards, it will drive the guide rod assembly 9013 to move downwards synchronously. The bottom end of the guide rod assembly 9013 is fixedly connected to the contact plate 9015, and the contact plate 9015 will also move downwards along with the guide rod assembly 9013.

[0060] A hollowed-out mounting bracket 9014 is fixedly connected to the bottom end of the sleeve assembly 9011. A contact switch A9016 is fixedly mounted on the top surface of the mounting bracket 9014, and a contact switch B9017 is fixedly mounted on the bottom surface. A connecting harness 9018 is also integrated into the bottom end of the mounting bracket 9014. One end of the connecting harness 9018 is electrically connected to contact switches A9016 and B9017, and the other end is electrically connected to a controller 1013 fixedly connected to the rear end face of the flotation mechanism 1. The controller 1013 adopts a PLC control structure, capable of receiving and processing electrical signals and issuing control commands. When the high temperature generated by the pulley assembly 2014 and the belt assembly 2015 reaches a certain threshold, the temperature-sensing expansion gas pushes the floating piston plate 9012 downward a sufficiently large distance, causing the contact plate 9015 to contact the contact switch B9017. After the contact switch B9017 is triggered, the connecting harness 9018 connects the contact... The signal is transmitted to the controller 1013. After receiving the signal, the controller 1013 prepares the program for the subsequent flotation liquid supply process and immediately starts the cooling motor 8011 fixedly connected to the rear of the cover mechanism 8. After the cooling motor 8011 starts, its front output shaft drives the installed fan blade assembly 8012 to rotate at high speed. The cold air generated by the rotation of the fan blade assembly 8012 will enter the interior of the cover mechanism 8 through the through slot opened on the right side of the cover mechanism 8 to cool down the pulley assembly 2014 and belt assembly 2015. At the same time, a sleeve assembly 8013 is fixedly connected to the bottom of the outer peripheral surface of the cover mechanism 8. The sleeve assembly 8013 communicates with the interior of the cover mechanism 8, and its outer peripheral surface has heat dissipation holes 8014 in a ring array. The hot air after cooling will be discharged to the outside of the cover mechanism 8 through these heat dissipation holes 8014, forming a complete heat dissipation cycle, effectively avoiding the impact of high temperature on the transmission components and the overall stability of the equipment.

[0061] Example 2

[0062] like Figures 1-5As shown, a drain pipe 101 is fixedly connected to the left end of the flotation mechanism 1. A drain valve 1011 is provided on the outside of the drain pipe 101. The drain valve 1011 is electrically connected to the contact switch B9017 through the controller 1013. When the contact plate 9015 is in a state of close contact with the contact switch B9017, the drain valve 1011 is open and the timing is stopped. A level switch 1012 is also fixedly connected to the inclined surface at the top of the flotation mechanism 1. The level switch 1012 is connected to the controller 1013. Electrically connected, a mounting base 4 is fixedly connected to the rear side of the flotation mechanism 1. A liquid supply pipe 401 is fixedly connected to the inner side of the mounting base 4. The liquid supply pipe 401 is used to supply liquid into the flotation mechanism 1, and a liquid supply pump 4011 is also installed on the outer side of the liquid supply pipe 401. The liquid supply pump 4011 is electrically connected to the contact switch A9016 and the level switch 1012 through the controller 1013. The contact plate 9015 is in contact with the contact switch A9016, and the level switch 1012 is in contact with the contact switch A9016. In the closed state, the liquid supply pump 4011 is in the open state, the liquid level switch 1012 is in the liquid-contact open state, the liquid supply pump 4011 is in the closed state, and the discharge bracket 3 is fixedly connected to the right side of the flotation mechanism 1. The discharge bracket 3 is connected to the flotation mechanism 1, and the top of the discharge bracket 3 is fixedly connected to an inclined screen plate assembly 301. The side of the discharge bracket 3 away from the flotation mechanism 1 is fixedly connected to a side plate assembly 3011. There are two side plate assemblies 3011. 11 is fixedly connected to the front and rear sides of the right end face of the discharge bracket 3. Two guide rollers are installed in a straight array on the inner side of the two side plate assemblies 3011. A conveyor motor 3012 is installed on the outer side of the side plate assembly 3011. The rear output shaft of the conveyor motor 3012 is connected to the guide rollers. A conveyor belt 3013 is also installed on the outer side of the two guide rollers. The conveyor belt 3013 and the guide rollers together form a feeding structure. A guide rail mechanism 5 is fixedly connected to the inner side of the flotation mechanism 1. The guide rail mechanism 5 is set vertically.

[0063] In this embodiment, during the flotation process, the supply of polyester chips will change according to production demand. When the supply of polyester chips suddenly increases, a large amount of polyester chips mixed with impurities will enter the flotation mechanism 1 in a short period of time. These chips and impurities will occupy a certain space inside the flotation mechanism 1, causing the flotation liquid level inside the flotation mechanism 1 to rise accordingly. In order to monitor the change of flotation liquid level in real time, a liquid level switch 1012 is fixedly connected to the inclined surface at the top of the flotation mechanism 1. The liquid level switch 1012 is electrically connected to the controller 1013 through the connecting wire harness 9018, which can transmit the liquid level signal to the controller 1013 in real time.

[0064] If the high temperature generated by the operation of the pulley assembly 2014 and belt assembly 2015 has previously triggered the contact plate 9015 to contact the contact switch A9016, and the controller 1013 has received the signal from the contact switch A9016 and is ready to supply liquid, at this time, if the flotation liquid level has not yet reached the trigger height of the level switch 1012, the level switch 1012 is in the closed state, and its closing signal is transmitted to the controller 1013 through the connecting harness 9018. After receiving the closing signal of the level switch 1012, the controller 1013 will immediately issue a control command to start the liquid supply system fixedly connected to the rear side of the flotation mechanism 1. The liquid supply system includes the mounting base plate 4. The system includes a supply pipe 401 and a supply pump 4011. The mounting base 4 is fixed to the rear side of the flotation mechanism 1, and the supply pipe 401 is fixed to the inner side of the mounting base 4. One end of the supply pipe 401 is connected to an external flotation liquid storage device, and the other end extends into the flotation mechanism 1. The supply pump 4011 is installed on the outside of the supply pipe 401 to provide power for the flotation liquid transportation. After the supply pump 4011 is started, the externally stored flotation liquid will be transported to the flotation mechanism 1 through the supply pipe 401 to replenish the amount of flotation liquid and ensure that the liquid level of the flotation liquid can meet the needs of the flotation operation. This avoids insufficient flotation due to the liquid level being too low, which would affect the separation effect of the flotation chips and impurities.

[0065] As the supply pump 4011 continuously delivers flotation liquid into the flotation mechanism 1, the level of the flotation liquid in the flotation mechanism 1 will gradually rise. When the level rises to contact the level switch 1012, the level switch 1012 is triggered, switching from the closed state to the open state, and transmitting the open signal to the controller 1013 through the connecting harness 9018. After receiving the open signal from the level switch 1012, the controller 1013 will immediately issue a command to stop the operation of the supply pump 4011, terminate the supply of flotation liquid into the flotation mechanism 1, prevent the flotation liquid from continuously increasing and causing the level to become too high, overflowing from the top opening of the flotation mechanism 1, avoiding waste of flotation liquid and pollution to the surrounding environment, and also ensuring the stable operation of the flotation process.

[0066] In actual production, after contact switch B9017 is triggered, the signal is transmitted to controller 1013 through connecting wire harness 9018. Upon receiving the signal, controller 1013 quickly issues a control command to activate the drainage system fixedly connected to the left end of flotation mechanism 1. This drainage system includes drainage pipe 101 and drainage valve 1011. One end of drainage pipe 101 is connected to the interior of flotation mechanism 1, and the other end is connected to external waste liquid collection equipment. Drainage valve 1011 is installed on the outside of drainage pipe 101 to control the opening and closing of drainage pipe 101. After drainage valve 1011 is opened, excess flotation liquid in flotation mechanism 1 will be drained through the drainage system. Pipe 101 discharges to an external collection device. At the same time, controller 1013 will time the opening time of drain valve 1011. For example, when the external pump draws A liters of liquid per second, the pumping time of drain valve 1011 and external pump can be set according to actual needs. For example, when it is necessary to draw B liters, the pump and control valve 1011 can be set to open for B divided by A time. When the flotation liquid level drops to the normal range, controller 1013 will issue a command to close drain valve 1011 and stop draining, ensuring that the flotation liquid level in flotation mechanism 1 is always kept in a reasonable range, avoiding overflow and ensuring flotation effect.

[0067] Example 3

[0068] like Figures 2-7 As shown, there are two guide rail mechanisms 5, which are fixedly connected to the front and rear sides of the flotation mechanism 1 in opposite directions. Both guide rail mechanisms 5 have longitudinal grooves inside, and longitudinally arranged traction push rods 501 are fixedly connected inside these grooves. Movable support arms 5011 are fixedly connected to the bottom ends of both traction push rods 501. There are two movable support arms 5011, and a flow-gathering mechanism 6 is fixedly connected to the inner side of each movable support arm 5011. The flow-gathering mechanism 6 has a frustum-shaped structure that is thicker at the top and thinner at the bottom, and a filter assembly 601 for discharging liquid is provided inside the flow-gathering mechanism 6. The bottom surface of the flow-gathering mechanism 6 has a ring-shaped array of fixed... An electromagnetic guide plate 6011 is fixedly connected to the flow-gathering mechanism 6. The electromagnetic guide plate 6011 is used to adsorb metal materials in the waste. A disc-shaped support guide plate 7 is fixedly connected to the bottom surface of the flow-gathering mechanism 6. The support guide plate 7 is connected to the flow-gathering mechanism 6 through a guide post. A conduit assembly 701 is fixedly connected to the top surface of the support guide plate 7. A top plate assembly 7011 is fixedly connected to the top surface of the conduit assembly 701. A mixed flow motor 7012 is installed on the top surface of the top plate assembly 7011. An output shaft is provided at the bottom of the mixed flow motor 7012. The support guide plate 7 extends downward from the output shaft. Mixed flow blades 7013 are fixedly connected in a ring array on the outer circumference of the output shaft.

[0069] In this embodiment, during the flotation operation of the flotation mechanism 1, the hopper assembly 201, supported by the support mechanism 2, continuously supplies polyester chips to the interior of the flotation mechanism 1 through the feed pipe assembly 2011 to ensure the continuity of the flotation operation. The flotation shaft 2016 drives the flotation plate 2017 to rotate continuously, flotating the polyester chips that have entered the flotation liquid. During the flotation process, impurities with higher density will gradually sink to the bottom of the flotation mechanism 1, while polyester chips with lower density will float on the surface of the flotation liquid or be suspended at a specific depth, achieving the initial separation of chips and impurities. However, relying solely on natural sinking, impurities are easily dispersed at various positions at the bottom of the flotation mechanism 1, making it difficult to collect them in a concentrated manner. This results in incomplete collection of impurities, affecting the subsequent recycling of the flotation liquid and the purity of the chips.

[0070] To address the issue of incomplete impurity collection, the device incorporates a dedicated impurity collection system. This system includes components such as a guide rail mechanism 5, a traction push rod 501, a movable support arm 5011, and a current-gathering mechanism 6. Two guide rail mechanisms 5 are fixedly connected, facing each other, to the front and rear sides of the flotation unit 1. The guide rail mechanism 5 has a longitudinal groove inside to provide a moving track. The traction push rod 501 is longitudinally fixedly connected inside the longitudinal groove of the guide rail mechanism 5. The movable support arm 5011 is fixedly connected to the bottom end of the traction push rod 501. The current-gathering mechanism 6 is fixedly connected to the inner sides of the two movable support arms 5011. When impurity collection is required, the controller 1013 issues a command to activate the traction push rod 501, which will... The movable support arm 5011 moves downward along the longitudinal groove of the guide rail mechanism 5, and the movable support arm 5011 drives the converging mechanism 6 to move downward synchronously until the converging mechanism 6 moves to the impurity concentration area near the bottom of the flotation mechanism 1. The converging mechanism 6 adopts a frustum-shaped structure with a thicker top and a thinner bottom. This structure is conducive to gathering the surrounding dispersed impurities into the converging mechanism 6. At the same time, the converging mechanism 6 has a filter assembly 601 inside. The pore size of the filter assembly 601 is designed to allow only the flotation liquor to pass through, while impurities cannot pass through. Therefore, during the process of the converging mechanism 6 gathering impurities, the flotation liquor will be discharged outside the converging mechanism 6 through the filter assembly 601, while the impurities will be left inside the converging mechanism 6, realizing the initial collection of impurities.

[0071] In addition, impurities may contain metal materials. If the metal materials are discharged with the impurities, it will not only waste resources, but may also damage the equipment in subsequent processing. In order to separate the metal materials in the impurities, electromagnetic guide plates 6011 are fixedly connected in a ring array on the bottom surface of the internal flow-gathering mechanism 6. The electromagnetic guide plates 6011 are connected to an external power supply through wires. When it is necessary to separate the metal materials, the controller 1013 controls the external power supply to energize the electromagnetic guide plates 6011. After the electromagnetic guide plates 6011 are energized, they generate magnetism and can adsorb the metal materials in the impurities inside the flow-gathering mechanism 6, thereby realizing the separation of metal materials from non-metallic impurities. After the impurities are collected, the power supply of the electromagnetic guide plates 6011 can be turned off, and the adsorbed metal materials can be recycled to improve the resource utilization rate and also improve the purity of impurity treatment.

[0072] During the impurity collection process of the converging mechanism 6, to prevent impurities from depositing around the converging mechanism 6 and affecting the impurity aggregation effect, the device is also equipped with a mixing component. The mixing component includes a support guide plate 7, a guide tube assembly 701, a top plate assembly 7011, a mixing motor 7012, and a mixing blade 7013. The support guide plate 7 has a disc-shaped structure and is fixedly connected to the inner bottom surface of the converging mechanism 6 by guide posts. The guide tube assembly 701 is fixedly connected to the top surface of the support guide plate 7, the top plate assembly 7011 is fixedly connected to the top of the guide tube assembly 701, and the mixing motor 7012 is installed on the top of the top plate assembly 7011. On the surface, the bottom end of the mixed-flow motor 7012 is provided with an output shaft, from which a support guide plate 7 extends downward. The mixed-flow blades 7013 are fixedly connected to the outer circumference of the output shaft in a ring array. When the concentrating mechanism 6 collects impurities, the controller 1013 starts the mixed-flow motor 7012. The output shaft of the mixed-flow motor 7012 drives the mixed-flow blades 7013 to rotate. The rotation of the mixed-flow blades 7013 will stir the flotation liquid around the concentrating mechanism 6, causing the flotation liquid to flow, preventing impurities from depositing around the concentrating mechanism 6, ensuring that impurities can smoothly enter the interior of the concentrating mechanism 6, and further improving the thoroughness of impurity collection.

[0073] After flotation, the polyester chips will gradually move to the right side of the flotation mechanism 1 under the continuous rotation of the flotation plate 2017 and enter the discharge support 3 that is connected to the flotation mechanism 1. The top of the discharge support 3 is fixedly connected to an inclined screen plate assembly 301. The screen hole size of the screen plate assembly 301 is designed to allow only polyester chips to pass through, while the small amount of residual fine impurities cannot pass through. When the polyester chips enter the discharge support 3, they will first be screened by the screen plate assembly 301. The residual fine impurities are trapped on the screen plate assembly 301 and can be cleaned periodically. The screened pure polyester chips will fall into the conveying area below the discharge support 3 through the screen plate assembly 301.

[0074] Two side plate assemblies 3011 are fixedly connected to the side of the discharge bracket 3 away from the flotation mechanism 1. The two side plate assemblies 3011 are arranged opposite each other and are fixed to the front and rear sides of the right end face of the discharge bracket 3 to form a conveying channel to prevent the slices from falling from both sides during the conveying process. Two guide rollers are installed in a straight array on the inner side of each side plate assembly 3011. The two ends of the guide rollers are rotatably connected to the side plate assembly 3011 through bearings to ensure that the guide rollers can rotate flexibly. A conveyor belt 3013 is installed on the outer side of the two guide rollers. The conveyor belt 3013 and the guide rollers together form a feeding structure. One of the guide rollers is the driving roller and the other is the driven roller. A conveyor motor 3012 is installed on the outer side of the side plate assembly 3011. The rear output shaft of the conveyor motor 3012 is fixedly connected to the driving guide roller through a coupling to provide power for the operation of the conveyor belt 3013.

[0075] When the screened polyester chips fall onto the conveyor belt 3013, the controller 1013 sends a command to start the conveyor motor 3012. The output shaft of the conveyor motor 3012 drives the active guide roller to rotate. The active guide roller drives the conveyor belt 3013 to run through the friction between the active guide roller and the conveyor belt 3013. The driven guide roller rotates synchronously with the movement of the conveyor belt 3013. During the operation of the conveyor belt 3013, the polyester chips on its surface are stably transported to the next production process, such as the melt extrusion process, realizing continuous and efficient transport of polyester chips. Compared with the traditional manual transport or single guide roller transport method, this transport structure not only greatly improves the transport efficiency, but also avoids the chips from being contaminated or damaged during transport, ensuring the quality stability of the raw materials for the subsequent preparation of high-toughness polyester film.

[0076] After the impurity collection operation is completed, the controller 1013 controls the traction push rod 501 to retract, driving the moving support arm 5011 and the flow-gathering mechanism 6 to move upward along the longitudinal groove of the guide rail mechanism 5 and return to the initial position so as to carry out the next round of impurity collection operation. At the same time, the impurities collected inside the flow-gathering mechanism 6 can be cleaned to ensure the normal operation of subsequent impurity collection operations, forming a complete impurity collection and slice conveying cycle.

[0077] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-toughness polyester film preparation apparatus, comprising a flotation mechanism (1) with a unidirectional opening at the top, characterized in that, The flotation mechanism (1) is filled with flotation liquid, and a flotation shaft (2016) is rotatably connected inside the top opening of the flotation mechanism (1). A flotation plate (2017) with a hollow structure is fixedly connected to the outside of the flotation shaft (2016). The inner side of the flotation mechanism (1) is fixedly connected to two support mechanisms (2) in a linear array. A hopper assembly (201) is fixedly connected to the top of each support mechanism (2). A hollow-structured feed tube assembly (2011) is fixedly connected to the bottom surface of the hopper assembly (201). A feed motor (2012) is installed on the front surface of the flotation mechanism (1). A feed valve plate (2013) is installed on the rear output shaft of the feed motor (2012). The valve plate (2013) is rotatably connected to the inner side of the feed pipe assembly (2011), and the output shaft of the feed valve plate (2013) extends rearward to form the flotation mechanism (1). The output shaft and the rear side of the flotation shaft (2016) are both coaxially mounted with pulley assemblies (2014). Belt assemblies (2015) are also mounted on the outer sides of the two pulley assemblies (2014). A cover is mounted on the rear side of the flotation mechanism (1) through the mounting plate (801) via a fixing bolt. The mechanism (8) has a through slot for heat dissipation on the right side, and a heat dissipation motor (8011) is fixedly connected to the rear side of the cover mechanism (8). A fan blade assembly (8012) is installed on the front output shaft of the heat dissipation motor (8011). A sleeve assembly (8013) is fixedly connected to the bottom of the outer peripheral surface of the cover mechanism (8). The sleeve assembly (8013) is in communication with the cover mechanism (8), and the outer peripheral surface of the sleeve assembly (8013) is annular. The array has heat dissipation holes (8014), and the inner wall of the sleeve assembly (8013) has internal threads and is screwed with a connecting mechanism (9). The connecting mechanism (9) has a transmission guide rod (901) with two protruding parts at the inside center. The transmission guide rod (901) is used to transmit the high temperature of the pulley assembly (2014) and belt assembly (2015) during operation. The sleeve assembly (9011) is fixedly connected to the bottom surface of the connecting mechanism (9).

2. The apparatus for preparing a high-toughness polyester film according to claim 1, characterized in that: A controller (1013) is fixedly connected to the rear end face of the flotation mechanism (1). The controller (1013) is a PLC control structure. A floating piston plate (9012) is installed inside the tube sleeve assembly (9011). A temperature-sensitive expansion gas is provided in the space between the floating piston plate (9012) and the tube sleeve assembly (9011). A guide rod assembly (9013) is fixedly connected to the bottom end face of the floating piston plate (9012).

3. The high-toughness polyester film preparation apparatus according to claim 2, characterized in that: The guide rod assembly (9013) is a cylindrical structure, and the guide rod assembly (9013) extends downward to form a sleeve assembly (9011). A contact plate (9015) is fixedly connected to the bottom end of the guide rod assembly (9013), and a hollow structure mounting bracket (9014) is fixedly connected to the bottom end of the sleeve assembly (9011). A contact switch A (9016) and a contact switch B (9017) are fixedly connected to the top and bottom end of the mounting bracket (9014), respectively. A connecting wire harness (9018) is integrated at the bottom end of the mounting bracket (9014), and the connecting wire harness (9018) is used to electrically connect to the controller (1013).

4. The apparatus for preparing a high-toughness polyester film according to claim 1, characterized in that: A drain pipe (101) is fixedly connected to the left end of the flotation mechanism (1). A drain valve (1011) is provided on the outside of the drain pipe (101). The drain valve (1011) is electrically connected to the contact switch B (9017) through the controller (1013). When the contact plate (9015) is close to the contact switch B (9017), the drain valve (1011) is open and the timing is stopped. A liquid level switch (1012) is also fixedly connected to the inclined surface at the top of the flotation mechanism (1). The liquid level switch (1012) is electrically connected to the controller (1013).

5. The apparatus for preparing a high-toughness polyester film according to claim 1, characterized in that: A mounting base plate (4) is fixedly connected to the rear side of the flotation mechanism (1). A liquid supply pipe (401) is fixedly connected to the inner side of the mounting base plate (4). The liquid supply pipe (401) is used to supply liquid to the interior of the flotation mechanism (1). A liquid supply pump (4011) is also installed on the outer side of the liquid supply pipe (401). The liquid supply pump (4011) is electrically connected to the contact switch A (9016) and the liquid level switch (1012) through the controller (1013). When the contact plate (9015) is in contact with the contact switch A (9016) and the liquid level switch (1012) is in the closed state, the liquid supply pump (4011) is in the open state. When the liquid level switch (1012) is in the liquid-contact open state, the liquid supply pump (4011) is in the closed state.

6. The apparatus for preparing a high-toughness polyester film according to claim 1, characterized in that: A discharge bracket (3) is fixedly connected to the right side of the flotation mechanism (1). The discharge bracket (3) is connected to the flotation mechanism (1). An inclined screen plate assembly (301) is fixedly connected to the top of the discharge bracket (3). A side plate assembly (3011) is fixedly connected to the side of the discharge bracket (3) away from the flotation mechanism (1). There are two side plate assemblies (3011), and the two side plate assemblies (3011) are fixedly connected to the front and rear sides of the right end face of the discharge bracket (3).

7. The high-toughness polyester film preparation apparatus according to claim 6, characterized in that: The inner sides of the two side plate assemblies (3011) are each equipped with two guide rollers in a straight array. The outer side of the side plate assembly (3011) is equipped with a conveyor motor (3012). The rear output shaft of the conveyor motor (3012) is connected to the guide rollers. The outer sides of the two guide rollers are also equipped with a conveyor belt (3013). The conveyor belt (3013) and the guide rollers together form a feeding structure. The inner side of the flotation mechanism (1) is fixedly connected with a guide rail mechanism (5), which is vertically arranged.

8. The apparatus for preparing a high-toughness polyester film according to claim 7, characterized in that: There are two guide rail mechanisms (5), and the two guide rail mechanisms (5) are fixedly connected to the front and rear sides inside the flotation mechanism (1) in opposite directions. The interior of the two guide rail mechanisms (5) is provided with a longitudinal groove, and a longitudinally arranged traction push rod (501) is fixedly connected inside the longitudinal groove. The bottom end of the two traction push rods (501) is fixedly connected with a movable support arm (5011), and two connecting sliders (5012) are fixedly connected to the outer side of the movable support arm (5011) in opposite directions.

9. The apparatus for preparing a high-toughness polyester film according to claim 8, characterized in that: The movable support arm (5011) is provided in two locations, and a flow-gathering mechanism (6) is fixedly connected to the inner side of each movable support arm (5011). The flow-gathering mechanism (6) is a frustoconical structure with a thicker upper part and a thinner lower part. The flow-gathering mechanism (6) has a filter assembly (601) for discharging liquid inside. Electromagnetic guide plates (6011) are fixedly connected in a ring array on the bottom surface of the inside of the flow-gathering mechanism (6). The electromagnetic guide plates (6011) are used to adsorb metal materials in the waste. A disc-shaped support structure is fixedly connected to the bottom surface of the inside of the flow-gathering mechanism (6). The guide plate (7) and the support guide plate (7) are connected to the flow-gathering mechanism (6) through the guide post. The top surface of the support guide plate (7) is fixedly connected to the guide tube assembly (701). The top surface of the guide tube assembly (701) is fixedly connected to the top plate assembly (7011). The top surface of the top plate assembly (7011) is equipped with a mixed flow motor (3012). The bottom end of the mixed flow motor (7012) is provided with an output shaft. The output shaft extends downward from the support guide plate (7). The outer circumferential surface of the output shaft is fixedly connected with mixed flow blades (7013) in a ring array.

10. A high-toughness polyester film preparation apparatus according to any one of claims 1-9, characterized in that, Includes the following steps: S1: Start the feeding motor (2012) at the front end of the flotation mechanism (1). The output shaft of the feeding motor (2012) drives the feeding valve plate (2013) inside the material tube assembly (2011) to rotate. The polyester chips in the hopper assembly (201) rotate with the feeding valve plate (2013) and are quantitatively fed into the flotation mechanism (1) through the material tube assembly (2011). S2: The feed motor (2012) outputs an axial flotation mechanism (1) with a rear extension and a flotation shaft (2016) with pulley assemblies (2014) installed on both sides. The two pulley assemblies (2014) are fitted with belt assemblies (2015) on their outer sides. When the feed motor (2012) is working, it drives the flotation shaft (2016) to rotate through the pulley assembly (2014) and belt assembly (2015). The hollow flotation plate (2017) on the outer side of the flotation shaft (2016) rotates synchronously to stir and float the polyester chips in the flotation liquid in the flotation mechanism (1). S3: The high temperature generated by the transmission between the pulley assembly (2014) and the belt assembly (2015) is transmitted to the tube sleeve assembly (901) by the transmission guide rod (901) of the inner connecting mechanism (9) of the rear cover mechanism (8) of the flotation mechanism (1). The temperature-sensitive expansion gas between the floating piston plate (9012) and the tube sleeve assembly (9011) is heated and expands, pushing the floating piston plate (9012) to move down, which in turn drives the guide rod assembly (9013) and the bottom contact plate (9015) to move down. S4: When the high temperature of the pulley assembly (2014) and belt assembly (2015) reaches the threshold, the contact plate (9015) moves down to trigger the contact switch B (9017). The contact switch B (9017) transmits the signal to the controller (1013) through the connecting wire harness (9018). The controller (1013) starts the cooling motor (8011) on the back of the cover mechanism (8). The cooling motor (8011) drives the fan blade assembly (8012) to rotate. The cold air enters through the through slot on the right side of the cover mechanism (8), and the hot air is discharged through the heat dissipation hole (8014) of the sleeve assembly (8013), thereby cooling the transmission components. S5: After receiving the signal from contact switch A (9016), if the level switch (1012) is in the closed state and the flotation liquid level has not reached the trigger height, the controller (1013) starts the supply pump (4011), and the external flotation liquid is transported to the flotation mechanism (1) through the supply pipe (401) to replenish the flotation liquid; S6: When the flotation liquid level rises to trigger the level switch (1012), the level switch (1012) will transmit the opening signal to the controller (1013), and the controller (1013) will shut down the supply pump (4011) to stop the supply of liquid; if the contact plate (9015) triggers the contact switch B (9017), the controller (1013) will open the drain valve (1011) on the drain pipe (101) to discharge the excess flotation liquid. At the same time, the controller (1013) will start a timer, and close the drain valve (1011) after the liquid level drops to the normal range. S7: The controller (1013) starts the traction push rod (501) in the guide rail mechanism (5). The traction push rod (501) drives the moving support arm (5011) to move down along the longitudinal groove of the guide rail mechanism (5). The moving support arm (5011) drives the flow-gathering mechanism (6) to move down to the bottom impurity area of ​​the flotation mechanism (1). The flow-gathering mechanism (6) gathers the impurities. The flotation liquid is discharged through the filter assembly (601), and the impurities are retained. In order to separate the metal material, the controller (1013) controls the electromagnetic guide plate (6011) to be energized to adsorb the metal material in the impurities. S8: The controller (1013) starts the mixed flow motor (7012) above the support guide plate (7). The output shaft of the mixed flow motor (7012) drives the mixed flow blade (7013) to rotate, stirring the flotation liquid around the flow-aggregating mechanism (6) to prevent impurities from depositing. S9: The polyester chips after flotation are pushed into the discharge bracket (3) by the flotation plate (2017), and after being screened by the screen plate assembly (301), the residual fine impurities are intercepted, and the pure chips fall into the conveyor belt (3013); the controller (1013) starts the conveyor motor (3012) on the outside of the side plate assembly (3011), the conveyor motor (3012) drives the guide roller to rotate, and the conveyor belt (3013) transports the chips to the next process; S10: After the impurities are collected, the controller (1013) controls the traction push rod (501) to retract, driving the flow-gathering mechanism (6) to move upward and reset; turn off the power of the electromagnetic guide plate (6011), recover the metal material, and clean the impurities in the flow-gathering mechanism (6).

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