Plastic film forming machine with cooling device

Abstract

The invention relates to a plastic film forming machine with a cooling device, which is applied to the field of film blowing machines, and comprises a blow molding head, a herringbone plate and a cooling assembly, the cooling assembly is mounted on a bracket through two symmetrically arranged support frames, the cooling assembly comprises a cooling cylinder, a rotating rod is mounted in the cooling cylinder, and the rotating rod is connected with the blow molding head. The surface of the rotating rod is sleeved with a first gear, a transfer frame is installed in the cooling cylinder, the transfer frame capable of being dynamically adjusted is arranged in the cooling cylinder, rapid switching of cooling states is achieved through a cooling cavity and a heat insulation cavity which are separated by a separation plate, and precise transmission of the first gear and a rack plate is matched. The transfer frame can be stably attached to the inner wall of the rotating cooling cylinder, the temporary cavity structure is in sliding fit with the transfer frame through the arc-shaped baffle, a small-volume temporary cavity is rapidly filled with cooling liquid firstly when the cooling liquid is replaced, then the remaining cavity is gradually filled with the cooling liquid, and efficient conveying of the cooling liquid and heat insulation liquid is ensured through the cooperative work of the double-cavity design in the flow dividing sleeve and the flow dividing pipe.

Description

Technical Field

[0001] The present invention relates to a plastic film forming machine, and particularly to a plastic film forming machine with a cooling device applied to the field of blown film machines. Background Art

[0002] A blown film machine is a mechanical device for producing plastic films and is widely used in fields such as packaging, agriculture, and construction. When processing plastic films, a cooling device is often required to cool the films to achieve a shaping effect. The cooling methods usually include air cooling and water cooling, which are selected according to specific situations.

[0003] The specification of Chinese invention patent CN119388719B discloses a PVB film forming die and its forming process. By quickly injecting water for cooling on the side where two cylinders are clamped and quickly squeezing and draining water on the opposite side, the rapid filling, circulation, and replacement process of cooling water are realized, significantly improving the cooling effect of the cylinders to ensure the cooling and forming quality of the PVB film.

[0004] The specification of Chinese invention patent CN117183304B discloses a PE shrink film blown film machine. By circulating the cooling water, it can be kept in a flowing state during the cooling process, making the temperatures on the surfaces of the anti-wrinkle roller, film guiding roller, guiding roller, and guiding plate more uniform, which is beneficial to the cooling and winding guiding work of the PE film body.

[0005] When the existing plastic film forming device performs a cooling operation, a cooling roller is used. However, during the actual operation, when replacing the water in the cooling roller, due to the certain space in the cooling roller, a certain space is required for replacing the water. During this period, the cooling roller cannot play an effective cooling role, resulting in a temporary interruption of the cooling operation. Summary of the Invention

[0006] Aiming at the above-mentioned prior art, the technical problem to be solved by the present invention is how to ensure the normal cooling operation of the cooling roller on the film during the period of replacing the water in the cooling roller during the blown film cooling process, so as to ensure the continuity of the cooling operation.

[0007] To solve the above problems, the present invention provides a plastic film forming machine with a cooling device, which includes a bracket, and a blow head, a chevron plate, and a cooling assembly are sequentially installed on the bracket from bottom to top. The cooling assembly is installed on the bracket through two symmetrically arranged support frames, and two vertically arranged cooling assemblies are installed inside each support frame. The cooling assembly includes a cooling cylinder, a rotating rod is installed inside the cooling cylinder, a first gear is sleeved on the surface of the rotating rod, an arc-shaped transfer frame whose outer wall is in close contact with the inner wall of the cooling cylinder is installed inside the cooling cylinder, and the transfer frames in the two support frames are arranged in a mirror image. The inside of the transfer frame is divided into a cooling chamber and a heat insulation chamber by a partition plate. A rack plate fixedly connected to the transfer frame and meshed with the first gear is provided on the surface of the transfer frame; The tail end of the rotating rod is rotatably connected to the inner wall of the cooling cylinder. A flow dividing sleeve is sleeved on the end surface of the rotating rod away from the tail end. The inside of the flow dividing sleeve is divided into two cavities by a partition plate. One cavity is marked as a flow cavity for the passage of coolant, and the other cavity is marked as a heat insulation cavity for the passage of heat insulating liquid. The end of the rotating rod away from the tail end is fixedly connected to the inner wall of the flow dividing sleeve.

[0008] In the above plastic film forming machine with a cooling device, a dynamically adjustable transfer frame is arranged inside the cooling cylinder, and the cooling state can be quickly switched through the cooling chamber and the heat insulation chamber separated by the partition plate, ensuring the continuity of the cooling operation.

[0009] As a further improvement of the present application, a first motor and a second motor are respectively installed on the two side surfaces of the support frame. A support rod extending to the outside of the support frame is connected to the end surface of each cooling cylinder away from the flow dividing sleeve. One end of each flow dividing sleeve extends out of the surface of the support frame. The output end of the first motor is rotationally connected to the two flow dividing sleeves through a driving gear, and the output end of the second motor is rotationally connected to the two support rods through a rotating gear.

[0010] As a further improvement of the present application, a flow dividing pipe is installed on the part of the flow dividing sleeve located on the inner surface of the cooling cylinder, and the length value of the flow dividing pipe is greater than the length value of the rack plate. The transfer frame is as long as the inner wall of the cooling cylinder, and a liquid guide pipe is connected through the end of the flow dividing sleeve away from the support frame.

[0011] As a further improvement of the present application, a first pipe and a second pipe are installed inside the flow dividing pipe. The first pipe is used to connect the cooling chamber and the flow cavity, and the second pipe is used to connect the heat insulation chamber and the heat insulation cavity.

[0012] As a further improvement of the present application, a drainage pipe is connected through one end of the support rod, and the drainage pipe is used to replace the coolant in the cooling cylinder. The other end of the support rod extends into the cooling cylinder.

[0013] As a further improvement of the present application, the arc surface of the transfer frame facing away from the rack plate and the isolation plate are both made of heat-conducting materials, and the remaining surfaces of the transfer frame are all made of heat-insulating materials. When the heat-insulating liquid is filled in the heat-insulating cavity, the entire transfer frame is in a heat-insulating state. After the heat-insulating liquid in the heat-insulating cavity is discharged, the entire transfer frame is in a heat-conducting state.

[0014] As a further improvement of the present application, electromagnetic rings are installed on the parts of the support rod and the flow dividing sleeve located outside the support frame, and the electromagnetic rings are all located outside the rotating gear and the driving gear. Magnetic adsorption coatings are installed on the surfaces of the rotating gear and the driving gear close to the electromagnetic rings.

[0015] As another improvement of the present application, a hoop is installed on the surface of the rotating rod through a bearing ring. A support rod is installed on the surface of the hoop. An arc-shaped baffle is fixedly installed inside the cooling cylinder through the support rod, and the end of the arc-shaped baffle is in sliding contact with the end surface of the transfer frame. The cavity formed by the outer surface of the arc-shaped baffle and the inner wall of the cooling cylinder is a tentative cavity.

[0016] As a supplement to another improvement of the present application, the ring diameter value of the tentative cavity is smaller than the thickness value of the transfer frame, and when the coolant is added to the cooling cylinder through the drainage pipe, it first enters the tentative cavity and then enters the inner space of the arc-shaped baffle.

[0017] In summary, a dynamically adjustable transfer frame is arranged inside the cooling cylinder. It realizes the rapid switching of the cooling state through the cooling cavity and the heat-insulating cavity separated by the isolation plate. Combined with the precise transmission of the first gear and the rack plate, the transfer frame can stably fit the inner wall of the rotating cooling cylinder. The combined design of the electromagnetic ring and the magnetic adsorption coating realizes the independent start and stop of a single cooling cylinder, which is convenient for maintenance. The added tentative cavity structure, through the sliding fit of the arc-shaped baffle and the transfer frame, first quickly fills the small-volume tentative cavity when the coolant is replaced, and then gradually fills the remaining cavity. The double-cavity design in the flow dividing sleeve and the coordinated work of the flow dividing pipes ensure the efficient delivery of the coolant and the heat-insulating liquid. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present application; Figure 2 It is a schematic diagram of the installation of the cooling component of the first embodiment of the present application; Figure 3 It is a schematic diagram of the internal structure of the cooling cylinder of the first embodiment of the present application; Figure 4 It is a schematic diagram of the internal structure of the transfer frame of the first embodiment of the present application; Figure 5 It is a schematic diagram of the internal structure of the flow dividing sleeve of the first embodiment of the present application; Figure 6 It is a schematic diagram of the state of the transfer frame of the first embodiment of the present application when it is close to the rotating rod; Figure 7 Schematic diagram of the temporary supplementary cooling state of the transfer frame when replacing the coolant in the cooling cylinder according to the first embodiment of the present application; Figure 8 Installation schematic diagram of the support frame and the arc-shaped baffle according to the second embodiment of the present application; Figure 9 Structural schematic diagram of the temporary cavity and the cooling cylinder according to the second embodiment of the present application; Figure 10 Schematic diagram of the state where the coolant enters the temporary cavity first according to the second embodiment of the present application; Figure 11 Schematic diagram of the state where the transfer frame moves and supplementary coolant is injected after the temporary cavity is filled with coolant according to the second embodiment of the present application.

[0019] Explanation of the reference numerals in the figure: 100, support; 200, blow molding head; 300, herringbone plate; 400, cooling assembly; 401, cooling cylinder; 402, shunt sleeve; 403, first gear; 404, rack plate; 405, transfer frame; 406, rotating rod; 407, shunt pipe; 4071, first pipe; 4072, second pipe; 4051, cooling cavity; 4052, heat insulation cavity; 5, first motor; 6, driving gear; 7, support frame; 8, liquid guide pipe; 81, first hose; 82, second hose; 9, electromagnetic ring; 10, second motor; 11, drainage pipe; 12, arc-shaped baffle; 13, support rod; 14, temporary cavity; 15, rotating gear. Specific embodiments

[0020] The following describes in detail two embodiments of the present application with reference to the accompanying drawings.

[0021] The first embodiment: Figures 1 - 4 A plastic film forming machine with a cooling device is shown, including a support 100, and a blow molding head 200, a herringbone plate 300, and a cooling assembly 400 are sequentially installed on the support 100 from bottom to top. The cooling assembly 400 is installed on the support 100 through two symmetrically arranged support frames 7, and two cooling assemblies 400 arranged up and down are installed inside each support frame 7. The cooling assembly 400 includes a cooling cylinder 401. A rotating rod 406 is installed inside the cooling cylinder 401. A first gear 403 is sleeved on the surface of the rotating rod 406. An arc-shaped transfer frame 405 whose outer wall is in close contact with the inner wall of the cooling cylinder 401 is installed inside the cooling cylinder 401. The transfer frames 405 in the two support frames 7 are arranged in a mirror image. The inside of the transfer frame 405 is divided into a cooling cavity 4051 and a heat insulation cavity 4052 by a partition plate. A rack plate 404 fixedly connected to the surface of the transfer frame 405 and meshed with the first gear 403 is provided; The tail end of the rotating rod 406 is rotatably connected to the inner wall of the cooling cylinder 401. A flow dividing sleeve 402 is sleeved on the end surface of the rotating rod 406 away from the tail end. The interior of the flow dividing sleeve 402 is divided into two cavities by a partition. One cavity is marked as the flow cavity for the passage of the coolant, and the other cavity is marked as the heat insulation cavity for the passage of the heat insulation liquid. The end of the rotating rod 406 away from the tail end is fixedly connected to the inner wall of the flow dividing sleeve 402.

[0022] The arc surface of the transfer frame 405 away from the rack plate 404 and the isolation plate are both made of heat-conducting materials, and the remaining surfaces of the transfer frame 405 are all made of heat-insulating materials. When the heat insulation liquid is filled in the heat insulation cavity 4052, the entire transfer frame 405 is in a heat-insulating state. After the heat insulation liquid in the heat insulation cavity 4052 is discharged, the entire transfer frame 405 is in a heat-conducting state.

[0023] Specifically, when performing the forming operation of the plastic film, after the molten plastic raw material is extruded through the blow molding head 200, a continuous film structure is sent out through the blow molding head 200. This part belongs to the conventional technical means in the field, so no detailed description will be given here.

[0024] After that, it is guided by the herringbone plate 300 to pass through the gap between the two cooling assemblies 400 for the cooling operation of the film. During cooling, the film passes through the middle of the rotating cooling cylinder 401 filled with the coolant inside and is subjected to a relatively uniform cooling operation.

[0025] When it is necessary to replace the coolant in the cooling cylinder 401 subsequently (the replacement can actually be judged according to the temperature change of the coolant detected by the temperature sensor installed in the cooling cylinder 401, which is an existing technology and will not be described in detail), at this time, the first motor 5 needs to be started to drive the driving gear 6 in the middle position to rotate, thereby driving the two driving gears 6 engaged with it to rotate, and then driving the two flow dividing sleeves 402 to rotate, so as to drive the two groups of rotating rods 406 to rotate, and then drive the first gear 403 to rotate, so that the rack plate 404 drives the transfer frame 405 to move in the direction away from the rotating rod 406 until the transfer frame 405 fits on the inner wall of the cooling cylinder 401. Subsequently, the heat insulation liquid (which can be silicone oil or other heat insulation liquids) in the heat insulation cavity 4052 is discharged by using a suction pump (not shown in the figure, which is an existing technology) and the second hose 82 connected to it, so that the heat insulation cavity 4052 is in an empty state. At this time, the coolant in the cooling cavity 4051 can contact the inner wall of the cooling cylinder 401 through the heat insulation cavity 4052 switched to the heat-conducting state, and then contact the film between the two cooling cylinders 401 for supplementary cooling operation (as Figure 7 shown). During this process, the old coolant in the cooling cylinder 401 can be discharged through the drainage pipe 11 (discharged by using a suction pump, not shown in the figure, which is an existing technology).

[0026] Since the rotating rod 406 and the cooling cylinder 401 are rotatably connected, when the rotating rod 406 rotates, it will not interfere with the cooling cylinder 401, so that the transfer frame 405 connected by the rack plate 404 can maintain a relatively stable contact state with the rotating cooling cylinder 401 (that is, the transfer frame 405 always faces the direction of the film to be cooled).

[0027] During the process of the transfer frame 405 performing alternative cooling, the coolant in the cooling cylinder 401 is replaced. Then, an insulating liquid is re-injected into the heat-insulating cavity 4052 by using a suction pump and a second hose 82, so that the transfer frame 405 becomes in a heat-insulating state. At this time, the newly injected coolant in the cooling cylinder 401 will not exchange heat with the transfer frame 405 that has already exchanged heat. Then, the first motor 5 is reversely rotated to make the transfer frame 405 approach the rotating rod 406 (as Figure 6 shown, in this way, it can be avoided that the contact between the transfer frame 405 and the inner wall of the cooling cylinder 401 causes incomplete cooling). During this process, the coolant in the cooling cavity 4051 is replaced by using a suction pump and a first hose 81, waiting for subsequent use.

[0028] On the two side surfaces of the support frame 7, a first motor 5 and a second motor 10 are respectively installed. At the end surface of each cooling cylinder 401 facing away from the flow dividing sleeve 402, a support rod extending to the outside of the support frame 7 is connected. One end of each flow dividing sleeve 402 extends out of the surface of the support frame 7. The output end of the first motor 5 is rotatably connected to the two flow dividing sleeves 402 through a driving gear 6, and the output end of the second motor 10 is rotatably connected to the two support rods through a rotating gear 15.

[0029] Specifically, the first motor 5 is used to drive the driving gear 6 in the middle position to rotate, thereby driving the upper and lower driving gears 6 to rotate, and then driving the two rotating rods 406 to rotate, indirectly performing the horizontal movement of the transfer frame 405 inside the cooling cylinder 401. The second motor 10 is used to drive the rotating gear 15 in the middle position to rotate, thereby driving the upper and lower rotating gears 15 to rotate, and then driving the two cooling cylinders 401 to rotate, realizing the circumferential cooling operation of the film between the two horizontally arranged cooling cylinders 401.

[0030] Figure 5 As shown, a flow dividing pipe 407 is installed on the part of the flow dividing sleeve 402 located on the inner surface of the cooling cylinder 401, and the length value of the flow dividing pipe 407 is greater than the length value of the rack plate 404. The transfer frame 405 is as long as the inner wall of the cooling cylinder 401, and a liquid guide pipe 8 is connected through the end of the flow dividing sleeve 402 facing away from the support frame 7. A first hose 81 and a second hose 82 are installed inside the liquid guide pipe 8, wherein the first hose 81 is communicated with the flow cavity, and the second hose 82 is communicated with the heat-insulating cavity.

[0031] Inside the flow divider tube 407, a first tube 4071 and a second tube 4072 are installed. The first tube 4071 is used to connect the cooling cavity 4051 and the flow cavity, and the second tube 4072 is used to connect the heat insulation cavity 4052 and the heat insulation chamber.

[0032] Specifically, due to the movement restriction of the rack plate 404, the end of the rack plate 404 will not touch the inner wall of the cooling cylinder 401 when the transfer frame 405 approaches the rotating rod 406. In addition, the two hoses inside the liquid guide tube 8 are respectively connected to the two cavities inside the flow divider sleeve 402 to achieve flow diversion and liquid guiding. Then, the feeding or discharging operations between different cavities inside the transfer frame 405 are realized through the first tube 4071 and the second tube 4072.

[0033] One end of the support rod is connected with a drainage tube 11 in a penetrating manner, and the drainage tube 11 is used to replace the coolant in the cooling cylinder 401. The other end of the support rod extends into the interior of the cooling cylinder 401.

[0034] Electromagnetic rings 9 are installed on the parts of the support rod and the flow divider sleeve 402 outside the support frame 7, and the electromagnetic rings 9 are both located outside the rotating gear 15 and the driving gear 6. Magnetic adsorption coatings are installed on the surfaces of the rotating gear 15 and the driving gear 6 close to the electromagnetic rings 9.

[0035] Specifically, the design of the electromagnetic ring 9 is mainly used when there is a problem on the surface of one of the cooling cylinders 401 (including cracks or other problems, resulting in the need to pause this cooling cylinder 401, but the other cooling cylinders 401 do not need to pause). At this time, the electromagnetic ring 9 on the surface of this cooling cylinder 401 can be activated to drive the rotating gears 15 at both ends to deviate from the meshing state with the rotating gear 15 in the middle position, so that this cooling cylinder 401 can stop rotating for maintenance.

[0036] The second implementation mode: Figures 8 - 9 It is shown that a hoop is installed on the surface of the rotating rod 406 through a bearing ring, a support rod 13 is installed on the surface of the hoop, an arc-shaped baffle 12 is fixedly installed inside the cooling cylinder 401 through the support rod 13, and the end of the arc-shaped baffle 12 is in sliding contact with the end surface of the transfer frame 405. The cavity formed by the outer surface of the arc-shaped baffle 12 and the inner wall of the cooling cylinder 401 is the temporary cavity 14.

[0037] The ring diameter value of the temporary cavity 14 is smaller than the thickness value of the transfer frame 405, and when the drainage tube 11 adds coolant into the cooling cylinder 401, it first enters the temporary cavity 14 and then enters the inner space of the arc-shaped baffle 12.

[0038] Different from the first embodiment, the volume of the cooling cylinder 401 is larger than that of the transfer frame 405. The time taken for discharging the old coolant and injecting the new coolant in the cooling cylinder 401 is marked as T. Due to reasons such as a long T or a high film temperature, during this period, the cooling effect in the transfer frame 405 may fail (because the volume of the coolant in the transfer frame 405 is limited. If T is greater than the time from the start of heat transfer to the failure of heat transfer, it will lead to a decrease in cooling quality). This embodiment mainly aims to improve this problem.

[0039] In this embodiment, the inner wall of the tail end of the drainage pipe 11 is installed with a discharge pipe through a bushing. The surface of the discharge pipe is installed with a pipe body extending into the temporary cavity 14. Control valves are installed on the surfaces of both the pipe body and the discharge pipe. When controlling the sequence of injecting coolant into the drainage pipe 11, first open the control valve on the surface of the pipe body, and then open the control valve on the surface of the discharge pipe.

[0040] Specifically, when injecting new coolant after discharging the old coolant, the new coolant first enters the temporary cavity 14 (as Figure 10 shown). At this time, the transfer frame 405 fits against the inner wall of the cooling cylinder 401. The volume of the temporary cavity 14 is significantly smaller than the interior of the cooling cylinder 401. Therefore, the time required to fill the temporary cavity 14 first is significantly shortened. After the temporary cavity 14 is filled, the transfer frame 405 is restored to the heat-insulating state and moved closer to the rotating rod 406. The gap between the transfer frame 405 and the arc-shaped baffle 12 facilitates the continuous injection of new coolant into the cooling cylinder 401 (as Figure 11 shown). And during the subsequent injection process, the transfer frame 405 is in a dynamic state of approaching and moving away from the rotating rod 406, which can stir the coolant in the cooling cylinder 401 and promote uniform temperature.

[0041] The arc-shaped baffle 12 is fixed inside the cooling cylinder 401 through the support rod 13. Therefore, the rotation of the cooling cylinder 401 and the rotating rod 406 will not affect the position of the arc-shaped baffle 12.

[0042] In summary, a dynamically adjustable transfer frame 405 is provided inside the cooling cylinder 401. Its cooling cavity 4051 and heat-insulating cavity 4052 separated by the isolation plate achieve a rapid switching of the cooling state. With the precise transmission of the first gear 403 and the rack plate 404, the transfer frame 405 can stably fit against the inner wall of the rotating cooling cylinder 401. The combined design of the electromagnetic ring 9 and the magnetic adsorption coating realizes the independent start and stop of a single cooling cylinder 401, which is convenient for maintenance. The added temporary cavity 14 structure, through the sliding cooperation of the arc-shaped baffle 12 and the transfer frame 405, first quickly fills the small-volume temporary cavity 14 during coolant replacement, and then gradually fills the remaining cavity. The double-chamber design in the flow dividing sleeve 402 and the coordinated work of the flow dividing pipe 407 ensure the efficient transportation of the coolant and the heat-insulating liquid.

[0043] Combined with the current actual requirements, the above-mentioned implementation manner adopted in this application, the scope of protection is not limited thereto. Within the scope of knowledge possessed by those skilled in the art, various changes made without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A plastic film forming machine with a cooling device, comprising a support (100) and a blow molding head (200), a herringbone plate (300) and a cooling assembly (400) mounted on the support (100) in order from bottom to top, characterized in that: The cooling assembly (400) is mounted on the bracket (100) via two symmetrically arranged support frames (7), and two cooling assemblies (400) arranged up and down are mounted inside each support frame (7), the cooling assembly (400) comprises a cooling cylinder (401), a rotating rod (406) is mounted inside the cooling cylinder (401), a first gear (403) is sleeved on the surface of the rotating rod (406), an arc-shaped transfer frame (405) is mounted inside the cooling cylinder (401), and the outer wall of the transfer frame (405) is in close contact with the inner wall of the cooling cylinder (401), and the transfer frames (405) in the two support frames (7) are arranged in a mirror image, and the interior of the transfer frame (405) is divided into a cooling chamber (4051) and a temperature insulation chamber (4052) by an isolation plate, wherein a rack plate (404) meshingly connected to the first gear (403) is fixedly connected to the surface of the transfer frame (405); The tail end of the rotating rod (406) is rotatably connected to the inner wall of the cooling cylinder (401), and the end surface of the rotating rod (406) away from the tail end is sleeved with a diverter sleeve (402), and the interior of the diverter sleeve (402) is divided into two cavities by a partition, one of which is marked as a flow cavity for the passage of cooling liquid, and the other is marked as an insulation cavity for the passage of insulation liquid, and the end of the rotating rod (406) away from the tail end is fixedly connected to the inner wall of the diverter sleeve (402).

2. A plastic film forming machine with a cooling device according to claim 1, characterized in that: A first motor (5) and a second motor (10) are respectively mounted on the two side surfaces of the support frame (7); the end surface of each cooling cylinder (401) facing away from the flow divider sleeve (402) is connected to a support rod extending to the outside of the support frame (7); one end of each flow divider sleeve (402) extends out of the surface of the support frame (7); the output end of the first motor (5) is rotationally connected to the two flow divider sleeves (402) via a driving gear (6); and the output end of the second motor (10) is rotationally connected to the two support rods via a rotating gear (15).

3. A plastic film forming machine with a cooling device according to claim 2, characterized in that: A shunt pipe (407) is installed on the portion of the shunt sleeve (402) located on the inner surface of the cooling cylinder (401), and the length of the shunt pipe (407) is greater than the length of the rack plate (404); the transfer frame (405) is of equal length to the inner wall of the cooling cylinder (401); and the end of the shunt sleeve (402) away from the support frame (7) is connected to a liquid guide tube (8); a hose 1 (81) and a hose 2 (82) are installed inside the liquid guide tube (8), wherein the hose 1 (81) is connected to the flow cavity, and the hose 2 (82) is connected to the heat insulation cavity.

4. A plastic film forming machine with a cooling device according to claim 3, characterized in that: The diverter pipe (407) has a first pipe (4071) and a second pipe (4072) installed inside, wherein the first pipe (4071) is used to connect the cooling chamber (4051) and the flow chamber, and the second pipe (4072) is used to connect the temperature insulation chamber (4052) and the heat insulation chamber.

5. A plastic film forming machine with a cooling device according to claim 4, characterized in that: One end of the support rod is connected through a drainage tube (11), and the drainage tube (11) is used to replace the coolant in the cooling cylinder (401), and the other end of the support rod extends to the interior of the cooling cylinder (401).

6. A plastic film forming machine with a cooling device according to claim 5, characterized in that: The arc-shaped surface of the transfer frame (405) facing away from the rack plate (404) and the isolation plate are both made of heat-conducting materials, and the remaining surface of the transfer frame (405) is all made of heat-insulating materials. When the temperature-insulating cavity (4052) is filled with heat-insulating liquid, the entire transfer frame (405) is in a heat-insulating state. After the heat-insulating liquid in the temperature-insulating cavity (4052) is discharged, the entire transfer frame (405) is in a heat-conducting state.

7. The plastic film forming machine with a cooling device according to claim 5, characterized in that: The parts of the support rod and the flow divider sleeve (402) located outside the support frame (7) are both installed with electromagnetic rings (9), and the electromagnetic rings (9) are both located outside the rotating gear (15) and the driving gear (6), and the surfaces of the rotating gear (15) and the driving gear (6) close to the electromagnetic rings (9) are both installed with magnetic coatings.

8. The plastic film forming machine with a cooling device according to claim 1, characterized in that: A hoop is installed on the surface of the rotating rod (406) via a bearing ring, and a support rod (13) is installed on the surface of the hoop. An arc-shaped baffle (12) is fixedly installed inside the cooling cylinder (401) via the support rod (13), and the end of the arc-shaped baffle (12) is in sliding contact with the end surface of the transfer frame (405). The cavity formed by the outer surface of the arc-shaped baffle (12) and the inner wall of the cooling cylinder (401) is a temporary cavity (14).

9. A plastic film forming machine with a cooling device according to claim 8, characterized in that: The ring diameter of the temporary cavity (14) is smaller than the thickness of the transfer frame (405), and when adding coolant into the cooling cylinder (401), the drainage tube (11) first enters the temporary cavity (14) and then enters the inner space of the arc-shaped baffle (12).

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