A cooling device for plastic film processing

Abstract

The invention discloses a cooling device for plastic film processing, which relates to the technical field of plastic film processing, including a cylindrical plastic film, and also includes: an adjustable water cooling mechanism, which is sleeved on the outside of the cylindrical plastic film and is used to adjust the contact area and contact volume between water and the cylindrical plastic film according to the thickness of the cylindrical plastic film during the blow molding process, and cool the cylindrical plastic film; the invention adjusts the contact area between the water and the outer wall of the cylindrical plastic film according to the thickness of the cylindrical plastic film by installing the adjustable water cooling mechanism, and quickly cools the vertically discharged cylindrical plastic film by a large volume of water, thereby improving the cooling speed and cooling effect, and installing a plastic film limiting pressure mechanism to ensure the normal discharge of the cylindrical plastic film while applying pressure to the inner wall of the cylindrical plastic film, thereby avoiding the problem of the cylindrical plastic film being concave when the water pressure is greater than the air pressure, and avoiding the situation where the contact area cannot be guaranteed due to excessive water loss.

Description

Technical Field

[0001] The invention relates to the technical field of plastic film processing, and in particular to a cooling device used for plastic film processing. Background Art

[0002] In the prior art, there is a downward-blowing water-cooled film blowing system with an authorization announcement number of CN 209580542 U, which includes a herringbone splint, a calender roller, a dryer, a splitting device, a first guide roller, a second guide roller, an online thickness measuring device, a corona machine, a winding device, at least one group of feeding mechanisms, at least one group of extruders, a die head, a water cooling mechanism and at least one longitudinal stretching adjustment mechanism, wherein the outlet of the feeding mechanism is connected to the inlet of the extruder, the outlet of the extruder is connected to the inlet of the die head, the water cooling mechanism is arranged at the outlet of the die head, and the inlet of the herringbone splint is connected to the outlet of the die head, the calender roller is arranged at the outlet of the herringbone splint, the outlet of the herringbone splint is connected to the inlet of the dryer, the outlet of the dryer is connected to the inlet of the splitting device, and the outlet of the splitting device is connected to the longitudinal stretching mechanism through the first guide roller.

[0003] Although the above scheme has the above advantages, the disadvantage of the above scheme is that the water-cooling mechanism of the downward-blowing water-cooled film blowing machine cools the middle cylindrical plastic film by overflowing. The cylindrical plastic film is sleeved in the middle of the water ring box. The inner ring height of the water ring box is lower than the outer ring height. The outer wall of the cylindrical plastic film contacts the inner wall of the water ring box. When the cylindrical plastic film moves downward, it contacts the water overflowing from the water ring box to achieve cooling. However, the volume of water in contact with the plastic film is small, the amount of water is small, and the contact area between the water and the plastic film is small, so the cooling molding speed will be affected, thereby affecting the processing efficiency. Summary of the invention

[0004] The present invention provides a cooling device for plastic film processing to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A cooling device for plastic film processing, comprising a cylindrical plastic film, and further comprising:

[0007] An adjustable water cooling mechanism is sleeved on the outside of the cylindrical plastic film and is used to adjust the contact area and volume between water and the cylindrical plastic film according to the thickness of the cylindrical plastic film during the blow molding process, and to cool the cylindrical plastic film;

[0008] The plastic film limiting pressure mechanism is located inside the cylindrical plastic film, and uses the cylindrical plastic film to fit the liquid outlet of the regulating water cooling mechanism and control the speed of water loss in the regulating water cooling mechanism;

[0009] A cooling area compensation mechanism, which is connected to the adjustable water cooling mechanism and is used to compensate for the contact area between water and the cylindrical plastic film;

[0010] A driving mechanism, which is connected to the regulating water cooling mechanism and the cooling area compensation mechanism, and is used to drive the regulating water cooling mechanism and the cooling area compensation mechanism to operate;

[0011] A water curtain is installed at the bottom of the regulated water cooling mechanism to continuously cool the plastic film.

[0012] Further, the adjustable water cooling mechanism comprises an annular water tank, a liquid level sensor is fixed to the top inner wall of the annular water tank, a liquid inlet is provided at the top of the annular water tank, a liquid outlet is provided at the inner ring of the annular water tank, a sealing ring is provided inside the ring of the annular water tank, the sealing ring blocks the liquid outlet, two movable plates 1 are fixed to the outer wall of the sealing ring, one of the movable plates 1 is provided with a screw 1 in an internal threaded sleeve, a gear 3 is installed at the bottom end of the screw 1, the screw 1 is rotatably connected to the bottom of the annular water tank, and the other movable plate 1 is provided with a guide rod 1 in an internal sleeve, and the guide rod 1 is fixed to the bottom of the annular water tank;

[0013] A plurality of mounting frames are fixed to the outer wall of the annular water tank;

[0014] The inner wall of the sealing ring is fixed with an anti-astringent film;

[0015] The water curtain is fixed to the bottom of the sealing ring;

[0016] The cylindrical plastic film is sleeved inside the ring of the annular water tank.

[0017] Furthermore, the plastic film limiting and pressurizing mechanism comprises a mounting rod, the mounting rod is sleeved inside the cylindrical plastic film, and the mounting rod is fixedly connected to the bottom of the discharge nozzle of the film blowing machine;

[0018] An annular air chamber 1 is fixed to the outside of the mounting rod, the outer ring wall of the annular air chamber 1 is a rubber ring 1, and the top of the annular air chamber 1 is connected to an inflation pipe 1;

[0019] The outer surface of the mounting rod is provided with a plurality of sliding grooves, the interior of the sliding grooves is sleeved with sliding blocks, an annular air bin 2 is fixed to the outside of the plurality of sliding blocks, the outer wall of the annular air bin 2 is a rubber ring 2, the outer walls of the rubber ring 1 and the rubber ring 2 are both fixed with anti-astringent material, the bottom of the annular air bin 2 is connected with an inflation tube 2, an air pipe installation channel is provided in the middle of the mounting rod, the inflation tube 2 is sleeved inside the air pipe installation channel, and the inflation tube 1 and the inflation tube 2 are externally connected to an air supply pump.

[0020] The plastic film limiting and pressurizing mechanism also includes a plurality of magnets 1 embedded in the outer wall of the sealing ring, and the inner wall of the annular air chamber 2 is fixed with magnets 2 corresponding to the number and position of magnets 1, and the magnets 1 and 2 attract each other.

[0021] The plastic film limiting and pressurizing mechanism also includes a mounting ring 1 fixed at the bottom of the annular air bin 2, and a plurality of push rod motors are fixed inside the mounting ring 1, and the output ends of the push rod motors face the mounting rods.

[0022] Furthermore, the cooling area compensation mechanism includes a screw rod 2 rotatably connected to the bottom of the annular water tank, a gear 4 is installed at the bottom end of the screw rod 2, the top of the screw rod 2 is rotatably connected to the bottom of the annular water tank, the external thread sleeve of the screw rod 2 is provided with a movable plate 2, a ring plate is fixed to one side of the movable plate 2, a movable plate 3 is fixed to the inner wall of the ring plate, a guide rod 2 is provided inside the movable plate 3, the guide rod 2 is fixedly connected to the bottom of the annular water tank, a plurality of connecting rods are fixed to the top of the ring plate, the plurality of connecting rods are penetrated and sleeved in the bottom of the annular water tank, a piston ring plate is sleeved on the inner wall of the annular water tank, and the top of the connecting rod is fixedly connected to the piston ring plate.

[0023] Furthermore, the driving mechanism includes motor 1 and motor 2 fixed at the bottom of the annular water tank, gear 1 is fixed to the output end of motor 1, gear 1 is meshed with gear 3, and gear 2 is fixed to the output end of motor 2, gear 2 is meshed with gear 4.

[0024] Furthermore, the motor 1, the motor 2, the liquid level sensor, the push rod motor and the air supply pump are electrically connected to a controller.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention adjusts the contact area between the water and the outer wall of the cylindrical plastic film according to the thickness of the cylindrical plastic film by installing an adjustable water cooling mechanism, and quickly cools the vertically discharged cylindrical plastic film through a large volume of water, thereby improving the cooling speed and cooling effect;

[0027] 2. The present invention installs a plastic film limiting and pressurizing mechanism to ensure the normal feeding of the cylindrical plastic film while applying pressure to the inner wall of the cylindrical plastic film, thereby preventing the cylindrical plastic film from sinking inward when the water pressure is greater than the air pressure, and avoiding the situation where the contact area cannot be guaranteed due to the excessive loss of water;

[0028] 3. The present invention installs a cooling area compensation mechanism to move the water body when the water loss rate is too fast to ensure the filling saturation of the water body at the liquid outlet position, thereby ensuring the stability of the contact area between the water body and the cylindrical plastic film. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention is a schematic structural diagram of a cooling device for plastic film processing.

[0030] Figure 2 The present invention is a schematic diagram of the driving mechanism structure of a cooling device for plastic film processing.

[0031] Figure 3 This is a schematic cross-sectional structural diagram from a first viewing angle of a cooling device for plastic film processing proposed by the present invention.

[0032] Figure 4 This is a schematic diagram of the cross-sectional structure from a second viewing angle of a cooling device for plastic film processing proposed by the present invention.

[0033] Figure 5 for Figure 3 Enlarged structural diagram at point A.

[0034] Figure 6 for Figure 4 Enlarged structural diagram at point B.

[0035] In the figure: 1. Cylindrical plastic film; 2. Adjustable water cooling mechanism; 21. Annular water tank; 22. Liquid inlet; 23. Sealing ring; 24. Moving plate 1; 25. Screw 1; 26. Gear 3; 27. Anti-astringent film; 28. Guide rod 1; 29. ​​Mounting frame; 210. Liquid level sensor; 3. Plastic film limit pressure mechanism; 31. Mounting rod; 32. Air pipe mounting channel; 33. Annular air chamber 1; 34. Inflatable tube 1; 35. Rubber ring 1; 36. Anti-astringent material; 37. Slide groove; 38. Sliding block ;39. Annular air chamber two;310. Rubber ring two;312. Inflatable tube two;313. Magnet two;314. Magnet one;315. Mounting ring one;316. Push rod motor;4. Cooling area compensation mechanism;41. Screw two;42. Moving plate two;43. Gear four;44. Guide rod two;45. Moving plate three;46. Ring plate;47. Connecting rod;48. Piston ring plate;5. Driving mechanism;51. Motor one;52. Gear one;53. Motor two;54. Gear two;6. Water flow curtain. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0039] Example: Refer to Figure 1-Figure 6 : A cooling device for plastic film processing, comprising a cylindrical plastic film 1, and also comprising:

[0040] The adjustable water cooling mechanism 2 is sleeved on the outside of the cylindrical plastic film 1 and is used to adjust the contact area and contact volume between water and the cylindrical plastic film 1 according to the thickness of the cylindrical plastic film 1 during the blow molding process, and to cool the cylindrical plastic film 1;

[0041] The plastic film limiting pressure mechanism 3 is located inside the cylindrical plastic film 1, and uses the cylindrical plastic film 1 to fit the liquid outlet of the adjustable water cooling mechanism 2, and controls the speed of water loss in the adjustable water cooling mechanism 2;

[0042] A cooling area compensation mechanism 4, which is connected to the adjustable water cooling mechanism 2 and is used to compensate for the contact area between water and the cylindrical plastic film 1;

[0043] A driving mechanism 5, which is connected to the regulating water cooling mechanism 2 and the cooling area compensation mechanism 4, and is used to drive the regulating water cooling mechanism 2 and the cooling area compensation mechanism 4 to operate;

[0044] The water curtain 6 is installed at the bottom of the adjustable water cooling mechanism 2 and is used to continuously cool the plastic film.

[0045] The adjustable water cooling mechanism 2 comprises an annular water tank 21, a liquid level sensor 210 is fixed to the top inner wall of the annular water tank 21, a liquid inlet 22 is provided at the top of the annular water tank 21, a liquid outlet is provided at the inner ring of the annular water tank 21, a sealing ring 23 is sleeved inside the ring of the annular water tank 21, the sealing ring 23 blocks the liquid outlet, two movable plates 24 are fixed to the outer wall of the sealing ring 23, one of the movable plates 24 is sleeved with a screw 25 on its internal threaded sleeve, a gear 3 26 is installed at the bottom end of the screw 25, the screw 25 is rotatably connected to the bottom of the annular water tank 21, and a guide rod 28 is sleeved inside the other movable plate 24, the guide rod 28 is fixed to the bottom of the annular water tank 21;

[0046] A plurality of mounting brackets 29 are fixed to the outer wall of the annular water tank 21;

[0047] The inner wall of the sealing ring 23 is fixed with an anti-astringent film 27;

[0048] The water curtain 6 is fixed to the bottom of the sealing ring 23;

[0049] The cylindrical plastic film 1 is sleeved inside the ring of the annular water tank 21;

[0050] The adjustable water cooling mechanism 2 adjusts the contact area between the water and the outer wall of the cylindrical plastic film 1 according to the thickness of the cylindrical plastic film 1, and quickly cools the vertically discharged cylindrical plastic film 1 through a large volume of water, thereby improving the cooling speed and cooling effect;

[0051] The large volume of water refers to the water in the entire water tank. The water in the entire water tank is used to cool the membrane that is pulled downward, greatly increasing the cooling speed.

[0052] The plastic film limiting and pressurizing mechanism 3 includes a mounting rod 31, which is sleeved inside the cylindrical plastic film 1 and fixedly connected to the bottom of the discharge nozzle of the film blowing machine;

[0053] An annular air chamber 33 is fixed to the outside of the mounting rod 31, the outer ring wall of the annular air chamber 33 is a rubber ring 35, and the top of the annular air chamber 33 is connected to an air charging pipe 34;

[0054] The outer surface of the mounting rod 31 is provided with a plurality of slide grooves 37, the interior of the slide grooves 37 is sleeved with a slider 38, an annular air bin 2 39 is fixed to the outside of the plurality of sliders 38, the outer wall of the annular air bin 2 39 is a rubber ring 2 310, the outer walls of the rubber ring 1 35 and the rubber ring 2 310 are both fixed with anti-astringent material 36, the bottom of the annular air bin 2 39 is connected with an inflation tube 2 312, an air pipe installation channel 32 is provided in the middle of the mounting rod 31, the inflation tube 2 312 is sleeved inside the air pipe installation channel 32, and the inflation tube 1 34 and the inflation tube 2 312 are externally connected to an air supply pump.

[0055] The plastic film limiting and pressurizing mechanism 3 also includes a plurality of magnets 314 embedded in the outer wall of the sealing ring 23, and the inner wall of the annular air chamber 2 39 is fixed with magnets 313 corresponding to the number and position of magnets 314, and magnets 314 and 313 attract each other.

[0056] The plastic film limiting and pressurizing mechanism 3 also includes a mounting ring 1 315 fixed at the bottom of the annular air chamber 2 39, and a plurality of push rod motors 316 are fixed inside the mounting ring 1 315, and the output end of the push rod motor 316 faces the mounting rod 31;

[0057] The plastic film limiting and pressurizing mechanism 3 ensures the normal feeding of the cylindrical plastic film 1 while applying pressure to the inner wall of the cylindrical plastic film 1 to avoid the problem of the cylindrical plastic film 1 sinking inward when the water pressure is greater than the air pressure, and solves the problem of the contact area being unable to be guaranteed due to the rapid loss of water.

[0058] The cooling area compensation mechanism 4 includes a screw rod 2 41 rotatably connected to the bottom of the annular water tank 21, a gear 43 is installed at the bottom end of the screw rod 2 41, the top of the screw rod 2 41 is rotatably connected to the bottom of the annular water tank 21, the external thread sleeve of the screw rod 2 41 is provided with a moving plate 2 42, a ring plate 46 is fixed to one side of the moving plate 2 42, a moving plate 3 45 is fixed to the inner wall of the ring plate 46, a guide rod 2 44 is sleeved inside the moving plate 3 45, the guide rod 2 44 is fixedly connected to the bottom of the annular water tank 21, a plurality of connecting rods 47 are fixed to the top of the ring plate 46, and the plurality of connecting rods 47 are penetrated and sleeved in the bottom of the annular water tank 21, a piston ring plate 48 is sleeved on the inner wall of the annular water tank 21, and the top of the connecting rod 47 is fixedly connected to the piston ring plate 48;

[0059] The cooling area compensation mechanism 4 moves the water body when the water loss speed is too fast to ensure the filling saturation of the water body at the liquid outlet position, thereby ensuring the stability of the contact area between the water body and the cylindrical plastic film 1.

[0060] The driving mechanism 5 includes a motor 1 51 and a motor 2 53 fixed at the bottom of the annular water tank 21. A gear 1 52 is fixed to the output end of the motor 1 51, and the gear 1 52 meshes with the gear 3 26. A gear 2 54 is fixed to the output end of the motor 2 53, and the gear 2 54 meshes with the gear 4 43.

[0061] Motor 1 51, motor 2 53, liquid level sensor 210, push rod motor 316 and air supply pump are electrically connected to a controller.

[0062] Working principle:

[0063] The mounting rod 31 is fixed to the center position of the downward discharge nozzle of the downward blowing film blowing machine, and the mounting frame 29 is fixed to the supporting frame of the downward blowing film blowing machine, and is located below the discharge nozzle. The cylindrical plastic film 1 extruded from the discharge nozzle is discharged from top to bottom, and the cylindrical plastic film 1 passes between the adjustable water cooling mechanism 2 and the plastic film limiting pressure mechanism 3;

[0064] The controller controls the motor 51 to drive the gear 52 to rotate, and the gear 52 drives the screw 25 to rotate through the gear 3 26, so that the movable plate 24 moves up and down. The movable plate 24 moves up and down to drive the sealing ring 23 and the anti-astringent film 27 to move. The downward movement of the sealing ring 23 will make the liquid outlet of the annular water tank 21 larger, and the upward movement will make the liquid outlet of the annular water tank 21 smaller. The size of the liquid outlet is determined by the specific thickness of the cylindrical plastic film 1. The thinner the film, the faster the cooling speed, so the liquid outlet needs to be adjusted to a small opening. The small opening has a slow water loss, saving water resources.

[0065] The outer wall of the cylindrical plastic film 1 blocks the liquid outlet, and the liquid inlet 22 continuously fills the annular water tank 21 with liquid. Because the cylindrical plastic film 1 has a certain blocking effect on the liquid outlet when it moves downward, the liquid in the annular water tank 21 will not flow out easily, and the internal liquid will be filled inside the liquid outlet, and the liquid outlet will contact the outer wall of the cylindrical plastic film 1 to cool it down. Because the water at the liquid outlet position and the water in the annular water tank 21 are integrated, the water volume for cooling the cylindrical plastic film 1 is large, the heat dissipation performance is good, and the heat of the cylindrical plastic film 1 can be quickly absorbed and conducted to the entire water body. The entire water body cools the cylindrical plastic film 1, and the cooling speed is fast and the effect is good.

[0066] When the temperature drops, the liquid level sensor 210 obtains the water level of the liquid in the annular water tank 21, and the liquid continuously enters the inside of the annular water tank 21 through the liquid inlet 22, so that the liquid always remains filled in the liquid outlet. When the water loss is too large, the water level will drop, and then there will be a gap in the liquid inlet 22, and the contact area with the cylindrical plastic film 1 will be reduced. Therefore, when the amount of liquid inflow cannot ensure that the liquid outlet is filled with liquid, the motor 2 53 drives the gear 2 54 to rotate, and the gear 2 54 drives the gear 4 43 and the screw 2 41 to rotate, so that the movable plate 2 42 drives the ring plate 46 and multiple connecting rods 47 to push the sealing ring 23 upward, and push the liquid in the annular water tank 21 to rise, so that the liquid is always filled in the inside of the liquid outlet to ensure the contact area. The larger the liquid outlet is opened, the larger the contact area between the liquid and the cylindrical plastic film 1 is, and the better the cooling effect is.

[0067] When the liquid outlet is adjusted, the sealing ring 23 drives the multiple magnets 1 314 to move up and down, and the multiple magnets 1 314 drive the magnet 2 313 and the annular air warehouse 2 39 and other structures to move up and down through the magnetic force, so that the distance between the annular air warehouse 1 33 and the annular air warehouse 2 39 is the same as the size of the liquid outlet. After the liquid outlet is adjusted, the controller controls the push rod motor 316 to extend the inner rod to contact the outer wall of the mounting rod 31 to generate friction to limit the annular air warehouse 2 39, and then the air supply pump fills the annular air warehouse 1 33 and the annular air warehouse 2 39 with a specified amount of gas through the inflation pipe 1 34 and the inflation pipe 2 312. The amount of gas is determined by the thickness of the cylindrical plastic film 1. The greater the thickness, the smaller the amount of gas, so that the rubber ring 1 35 and the rubber ring 2 310 exert moderate pressure on the plastic film, which meets the water contact while ensuring the normal downward movement of the cylindrical plastic film 1. The gas The rubber ring is made to bulge outward and contact with the inner wall of the cylindrical plastic film 1, the annular air bin 1 33 makes the outer wall of the cylindrical plastic film 1 contact with the inner ring top of the annular water tank 21, and the annular air bin 2 39 makes the outer wall of the cylindrical plastic film 1 contact with the anti-astringent film 27. The annular air bin 1 33 and the annular air bin 2 39 apply pressure to the cylindrical plastic film 1 to prevent the water pressure at the liquid outlet from causing the cylindrical plastic film 1 to sag inward. Because when the film blowing machine blows the film, there is gas blown out in the middle of the cylindrical plastic film 1. When the water pressure is greater than the air pressure, the cylindrical plastic film 1 will sag, and the liquid will easily flow out, resulting in the inability to fill the liquid outlet fully and the contact area being difficult to reach. Therefore, the plastic film limiting pressure-applying mechanism 3 applies pressure to the inner wall of the cylindrical plastic film 1, so that it does not affect the unloading and the liquid in the liquid outlet can be filled fully, thereby ensuring the contact area between the water body and the film and improving the cooling effect.

[0068] Because of the movement of the cylindrical plastic film 1, the liquid at the liquid outlet will also flow away, and the liquid flows down along the cylindrical plastic film 1. When flowing down, the water curtain 6 allows the continuous water to evenly contact the surface of the cylindrical plastic film 1, so that the water continues to cool the film. The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, make equivalent replacement or change, should be covered within the protection scope of the present invention.

Claims

1. A cooling device for plastic film processing, comprising a cylindrical plastic film (1), characterized in that: Also includes: An adjustable water cooling mechanism (2) is sleeved on the outside of the cylindrical plastic film (1) and is used to adjust the contact area and contact volume between water and the cylindrical plastic film (1) according to the thickness of the cylindrical plastic film (1) during the blow molding process, and to cool the cylindrical plastic film (1); A plastic film limiting pressure-applying mechanism (3) is located inside the cylindrical plastic film (1), and uses the cylindrical plastic film (1) to fit the liquid outlet of the adjustable water cooling mechanism (2) and control the speed of water loss in the adjustable water cooling mechanism (2); A cooling area compensation mechanism (4) connected to the adjustable water cooling mechanism (2) and used to compensate for the contact area between water and the cylindrical plastic film (1); A driving mechanism (5) connected to the regulating water cooling mechanism (2) and the cooling area compensation mechanism (4) and used to drive the regulating water cooling mechanism (2) and the cooling area compensation mechanism (4) to operate; A water curtain (6) installed at the bottom of the adjustable water cooling mechanism (2) for continuously cooling the plastic film; The adjustable water cooling mechanism (2) comprises an annular water tank (21), a liquid level sensor (210) is fixed to the inner wall of the top of the annular water tank (21), a liquid inlet (22) is provided at the top of the annular water tank (21), a liquid outlet is provided in the inner ring of the annular water tank (21), a sealing ring (23) is sleeved inside the ring of the annular water tank (21), the sealing ring (23) blocks the liquid outlet, and two movable plates (24) are fixed to the outer wall of the sealing ring (23), one of the movable plates (24) is sleeved internally with a screw (25), the bottom end of the screw (25) is mounted with a gear (26), the screw (25) is rotatably connected to the bottom of the annular water tank (21), and the other movable plate (24) is sleeved internally with a guide rod (28), the guide rod (28) is fixed to the bottom of the annular water tank (21); The plastic film limiting and pressurizing mechanism (3) comprises a mounting rod (31), wherein the mounting rod (31) is sleeved inside the cylindrical plastic film (1); An annular air chamber (33) is fixed to the outside of the mounting rod (31); the outer ring wall of the annular air chamber (33) is a rubber ring (35); and the top of the annular air chamber (33) is connected to an inflation tube (34).

2. A cooling device for plastic film processing according to claim 1, characterized in that: A plurality of mounting frames (29) are fixed to the outer wall of the annular water tank (21); An anti-astringent film (27) is fixed to the inner wall of the sealing ring (23); The water curtain (6) is fixed to the bottom of the sealing ring (23); The cylindrical plastic film (1) is sleeved inside the ring of the annular water tank (21).

3. A cooling device for plastic film processing according to claim 2, characterized in that: The outer surface of the mounting rod (31) is provided with a plurality of slide grooves (37), the interior of the slide grooves (37) is sleeved with a slider (38), an annular air chamber (39) is fixed to the outside of the plurality of sliders (38), the outer wall of the annular air chamber (39) is a rubber ring (310), the outer walls of the rubber ring (35) and the rubber ring (310) are both fixed with an anti-astringent material (36), the bottom of the annular air chamber (39) is connected with an inflation tube (312), an air tube installation channel (32) is provided in the middle of the mounting rod (31), the inflation tube (312) is sleeved inside the air tube installation channel (32), and the inflation tube (34) and the inflation tube (312) are externally connected to an air supply pump.

4. A cooling device for plastic film processing according to claim 3, characterized in that: The plastic film limiting and pressurizing mechanism (3) further comprises a plurality of magnets one (314) embedded in the outer wall of the sealing ring (23), and the inner wall of the annular air chamber two (39) is fixed with magnets two (313) corresponding in number and position to the magnets one (314), and the magnets one (314) and the magnets two (313) attract each other.

5. A cooling device for plastic film processing according to claim 4, characterized in that: The plastic film limiting and pressurizing mechanism (3) further comprises a mounting ring 1 (315) fixed to the bottom of the annular air chamber 2 (39), a plurality of push rod motors (316) being fixed inside the mounting ring 1 (315), and the output ends of the push rod motors (316) are oriented toward the mounting rod (31).

6. A cooling device for plastic film processing according to claim 5, characterized in that: The cooling area compensation mechanism (4) comprises a screw rod 2 (41) rotatably connected to the bottom of the annular water tank (21), a gear 4 (43) being installed at the bottom end of the screw rod 2 (41), the top end of the screw rod 2 (41) being rotatably connected to the bottom of the annular water tank (21), a movable plate 2 (42) being sleeved on the external thread of the screw rod 2 (41), a ring plate (46) being fixed on one side of the movable plate 2 (42), a movable plate 3 (45) being fixed on the inner wall of the ring plate (46), a guide rod 2 (44) being sleeved inside the movable plate 3 (45), the guide rod 2 (44) being fixedly connected to the bottom of the annular water tank (21), a plurality of connecting rods (47) being fixed on the top of the ring plate (46), the plurality of connecting rods (47) being sleeved through the bottom of the annular water tank (21), a piston ring plate (48) being sleeved on the inner wall of the annular water tank (21), the top end of the connecting rod (47) being fixedly connected to the piston ring plate (48).

7. A cooling device for plastic film processing according to claim 6, characterized in that: The driving mechanism (5) comprises a motor 1 (51) and a motor 2 (53) fixed to the bottom of the annular water tank (21); a gear 1 (52) is fixed to the output end of the motor 1 (51); the gear 1 (52) meshes with the gear 3 (26); and a gear 2 (54) is fixed to the output end of the motor 2 (53); the gear 2 (54) meshes with the gear 4 (43).

8. A cooling device for plastic film processing according to claim 7, characterized in that: The motor 1 (51), the motor 2 (53), the liquid level sensor (210), the push rod motor (316) and the air supply pump are electrically connected to a controller.

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